Chapter 3: Problem 50
Find the intercepts. Then graph. $$ 6 x+2 y=12 $$
Short Answer
Expert verified
x-intercept: (2, 0); y-intercept: (0, 6).
Step by step solution
01
- Find the x-intercept
To find the x-intercept, set y to 0. Solve for x in the equation \(6x + 2(0) = 12\). This simplifies to \(6x = 12\), giving \(x = 2\). Hence, the x-intercept is (2, 0).
02
- Find the y-intercept
To find the y-intercept, set x to 0. Solve for y in the equation \(6(0) + 2y = 12\). This simplifies to \(2y = 12\), giving \(y = 6\). Hence, the y-intercept is (0, 6).
03
- Plot the intercepts on a graph
To graph the equation, plot the intercepts \(2, 0\) and \(0, 6\) on the coordinate plane. Draw a straight line through these two points to represent the line \(6x + 2y = 12\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
x-intercept
The x-intercept is where a graph crosses the x-axis, so the coordinate for y will always be 0. To find the x-intercept of an equation, you simply substitute y with 0 and solve for x. For example, in the equation \(6x + 2y = 12\), replacing y with 0 gives \(6x + 2(0) = 12\). This simplifies to \(6x = 12\). Solving for x, we find \(x = 2\). Therefore, the x-intercept is at the point (2, 0).
Remember:
Remember:
- Set y to 0
- Solve for x
- The result is your x-intercept
y-intercept
The y-intercept is where a graph crosses the y-axis, meaning the coordinate for x will always be 0. To find the y-intercept, you set x to 0 and solve for y. Taking the equation \(6x + 2y = 12\) again, substituting x with 0 results in \(6(0) + 2y = 12\). This simplifies to \(2y = 12\). Solving for y, we get \(y = 6\). Hence, the y-intercept is at the point (0, 6).
Remember:
Remember:
- Set x to 0
- Solve for y
- The result is your y-intercept
graphing linear equations
Graphing linear equations involves plotting points on a coordinate plane and connecting them with a straight line. For the equation \(6x + 2y = 12\), first find the intercepts. We found the x-intercept to be (2, 0) and the y-intercept to be (0, 6). Next, we plot these points on the coordinate plane.
To complete the graph, draw a straight line through these two points. This line represents the equation \(6x + 2y = 12\). Since it is a linear equation, its graph will always be a straight line.
Remember:
To complete the graph, draw a straight line through these two points. This line represents the equation \(6x + 2y = 12\). Since it is a linear equation, its graph will always be a straight line.
Remember:
- Find intercepts
- Plot points
- Draw line through points
coordinate plane
The coordinate plane is a two-dimensional plane formed by the intersection of a vertical y-axis and a horizontal x-axis. Each point on this plane is defined by an ordered pair (x, y), where x is the horizontal coordinate and y is the vertical one.
For example, the point (2, 0) signifies 2 units along the x-axis and 0 units along the y-axis. Similarly, the point (0, 6) represents 0 units along the x-axis and 6 units up the y-axis. These points help in locating where a line or curve will pass.
The coordinate plane is fundamental in graphing equations and understanding the spatial relationship between variables.
Quick tips:
For example, the point (2, 0) signifies 2 units along the x-axis and 0 units along the y-axis. Similarly, the point (0, 6) represents 0 units along the x-axis and 6 units up the y-axis. These points help in locating where a line or curve will pass.
The coordinate plane is fundamental in graphing equations and understanding the spatial relationship between variables.
Quick tips:
- The x-axis is horizontal
- The y-axis is vertical
- Points are written as (x, y)
solving for intercepts
Solving for intercepts involves a straightforward method of isolating the variable.
To find the x-intercept, set y to 0 and solve the resulting equation for x.
To find the y-intercept, set x to 0 and solve the resulting equation for y.
Let's recap using the equation \(6x + 2y = 12\):
To find the x-intercept, set y to 0 and solve the resulting equation for x.
To find the y-intercept, set x to 0 and solve the resulting equation for y.
Let's recap using the equation \(6x + 2y = 12\):
- x-intercept: Set y = 0, then solve \(6x = 12\) to get x = 2.
- y-intercept: Set x = 0, then solve \(2y = 12\) to get y = 6.