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91Ó°ÊÓ

Find the \(x\) - and \(y\) -intercepts. Then graph each equation. $$ y=5 $$

Short Answer

Expert verified
The y-intercept is (0, 5). There is no x-intercept.

Step by step solution

01

Identify the equation type

The equation given is a horizontal line, as it's in the form of y = b.
02

Find the y-intercept

Since the equation is y = 5, the y-intercept is the value of y when x=0, which is 5. Hence, the y-intercept is at (0, 5).
03

Find the x-intercept

To find the x-intercept, set y to 0 and solve for x. However, y = 5 never equals 0, so there is no x-intercept for this equation.
04

Graph the equation

Draw a horizontal line that crosses the y-axis at y=5. This line extends infinitely in both the positive and negative directions on the x-axis.

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Key Concepts

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

Graphing Equations
When you graph equations, you visually represent the relationship between variables on a coordinate plane. For the equation given, which is a simple equation of the form \(y = b\), we often see a straight line. This type of equation graphically shows how the value of y remains consistent, no matter what value x holds.
Horizontal Line
A horizontal line represents a situation where the value of y is constant. No upward or downward movement from the left to the right is displayed. For our given equation \(y = 5\), the graph will show a straight line parallel to the x-axis, intersecting the y-axis at y = 5. This means every point on this line will have a y-coordinate of 5. To graph a horizontal line:
  • Identify the y-intercept, which is the point where the line crosses the y-axis.
  • Draw a straight line across the graph, ensuring it is parallel to the x-axis and intersects the y-axis at y=5.
Intercepts
Intercepts are points where a line crosses the axes. For the equation \(y = 5\):
  • y-intercept: At x=0, the y-value is 5. Therefore, the y-intercept is at (0, 5).
  • x-intercept: For the x-intercept, we need to set y to 0. However, in \(y = 5\), y is always 5 and never 0. Thus, there is no x-intercept for this horizontal line.
To determine intercepts in general:
  • For the y-intercept, set x=0 and solve for y.
  • For the x-intercept, set y=0 and solve for x.
Identifying intercepts helps in sketching the graph accurately, providing crucial points where the line intersects the axes.

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