Concept explainers
Explain how to find the x − intercept and y − intercept of a graph and summarize how to graph a linear equation.
Answer to Problem 64HP
Explanation of Solution
Given:
Concept Used:
The x -intercepts are where the graph crosses the x -axis, and the y -intercepts are where the graph crosses the y -axis.
Then, algebraically,
- an x -intercept is a point on the graph where y is zero, and
- a y -intercept is a point on the graph where x is zero.
More specifically,
- an x -intercept is a point in the equation where the y -value is zero, and
- a y -intercept is a point in the equation where the x -value is zero.
Calculation:
How to find the x and y intercepts from the graph.
Example equation:
Graph the line
Find the x − intercept, look for the point where the line crosses the x − axis.
In the graph there is a point
Find the y − intercept, look for the point where the line crosses the y − axis.
In the graph there is a point
x − Intercept = 4 and y − intercept is
How to graph a linear equation:
To solve a linear equation graphically, find the related function by rewriting the equation with everything on one side and the other side equal to zero. Then graph the related function. The x − intercept is the solution.
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Algebra 1
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