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graph each linear equation in two variables. Find at least five solutions in your table of values for each equation. $$y=-\frac{1}{4} x$$

Short Answer

Expert verified
The solutions to the equation \(y=-\frac{1}{4} x\) are all ordered pairs (x, y) that make the equation true when substituted. Some examples include (-2, 0.5), (0, 0), (2, -0.5), (4, -1), and (6, -1.5), and the graph of the equation is a straight line passing through these points with a negative slope.

Step by step solution

01

Understanding the Equation

First, it's important to understand what \(y=-\frac{1}{4} x\) represents. This equation indicates that the value of y decreases by 1/4 for each increase in x by 1 unit.
02

Creating the Table of Values

Choose five different values for x. These can be any real numbers, but for simplicity, let's choose -2, 0, 2, 4, and 6. Substitute these values into the equation to find the corresponding values of y. For example, when x=-2, \(y= -\frac{1}{4}*(-2) = 0.5\). Repeat this for each chosen x value.
03

Plotting the Points and Drawing the Line

Plot the ordered pairs (x, y) on a coordinate plane. Next, draw a line that passes through the points. If done correctly, all points should lie on the line as this is a linear equation.
04

Finding the Solutions

The solutions to the equation are the set of all ordered pairs (x, y) that make the equation true. In this case, the five points derived from the table of values are solutions, since those resulted in true statements when substituted into the equation.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Graphing Linear Equations
Graphing linear equations is a foundational concept in algebra. It involves drawing a line on the coordinate plane that represents all solutions of a given linear equation. A linear equation forms a straight line when graphed. For example, the equation \(y=-\frac{1}{4}x\) creates a line where the slope, or steepness, is \(-\frac{1}{4}\). To graph a linear equation, you need to plot points that satisfy the equation. These points are derived by choosing values for \(x\) and calculating the corresponding \(y\) values. The line you draw through these points represents all possible solutions, extending infinitely in both directions on the graph. Moreover, understanding the intercepts鈥攚here the line crosses the x-axis and y-axis鈥攃an be extremely helpful. In \(y=-\frac{1}{4}x\), the line crosses the origin (0,0) because there is no constant term.
Solutions of Linear Equations
Solutions of linear equations are the pairs of \((x, y)\) that make the equation true. For the given equation \(y=-\frac{1}{4}x\), each solution creates a point on the graph. In other words, if you substitute an \(x\) value and the corresponding \(y\) value into the equation, it should hold true.In the step-by-step solution, we identified five solutions by selecting values for \(x\) such as -2, 0, 2, 4, and 6. By substituting these into our equation, we calculated the respective \(y\) values which are 0.5, 0, -0.5, -1, and -1.5. All these points are solutions because they maintain equality in the equation.Finding solutions is critical when graphing as it provides points to plot, confirming the line's correctness. It's essential to check multiple points, at least three, to ensure accuracy and that the points indeed lie on a straight line.
Table of Values
A table of values is a useful tool for organizing and calculating coordinates to graph a linear equation. It typically consists of two columns, one for \(x\) values and one for \(y\) values, derived from substituting \(x\) into the linear equation.When constructing a table of values, select a range of \(x\) values. It helps to choose both negative and positive numbers to see how the graph behaves across different regions. For \(y=-\frac{1}{4}x\), we chose \(-2, 0, 2, 4,\) and \(6\) as our \(x\) values. After computation, the respective \(y\) values added to the table were 0.5, 0, -0.5, -1, and -1.5.Using a table of values provides a clear systematic approach to finding several solutions to graph accurately. This table not only assists in graphing but also offers a visual representation of how \(x\) changes affect \(y\) in the equation.
Coordinate Plane
The coordinate plane is a two-dimensional surface where we can graph points, lines, and shapes. This plane is divided into four quadrants by the x-axis and y-axis intersecting at the origin (0,0).In graphing a linear equation like \(y=-\frac{1}{4}x\), we use the coordinate plane as the canvas. Each point from our table of values corresponds to an ordered pair \((x, y)\) that we plot on this plane. The x-axis represents horizontal positions, while the y-axis represents vertical. It's vital to properly scale your axes to encompass all relevant points from your table of values.Once the points are plotted, you connect them with a straight line. This line represents all solutions of the equation on the coordinate plane. The clarity of this visual representation is why mastering the coordinate plane is crucial in graphing linear equations.

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Most popular questions from this chapter

The graph shows that in \(2000,31 \%\) of U.S. adults viewed a college education as essential for success. For the period from 2000 through 2010 , the percentage viewing a college cducation as essential for success increased on average by approximately 2.4 each year. These conditions can be described by the mathematical model $$ S=2.4 n+31 $$ where \(S\) is the percentage of U.S. adults who vicwed college as essential for success \(n\) years after 2000 . a. Let \(n=0,5,10,15,\) and \(20 .\) Make a table of values showing five solutions of the equation. b. Graph the formula in a rectangular coordinate system. Suggestion: Let each tick mark on the horizontal axis, labeled \(n,\) represent 5 units. Extend the horizontal axis to include \(n=25 .\) Let each tick mark on the vertical axis, labeled \(S\), represent 10 units and extend the axis to include \(S=100\)

Determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. The ordered pair \((0,-3)\) satisfies \(y>2 x-3\)

Explain how to find ordered pairs that are solutions of an equation in two variables, \(x\) and \(y\)

Determine whether each statement "makes sense" or "does not make sense" and explain your reasoning. When I write a linear inequality with \(y\) isolated on the left, \(<\) indicates a region that lies below the boundary line.

determine whether each statement 鈥渕akes sense鈥 or 鈥渄oes not make sense鈥 and explain your reasoning. When I know that an equation's graph is a straight line, I don't need to plot more than two points, although I sometimes plot three just to check that the points line up.

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