3
ALMultiple Choice

Break-Even Points

Question 3 • LJISD-TX-Precalculus-B-CR

If you solve an equation by graphing each side as a separate line, which of the following corresponds to the solution of the equation?

Answer
A
there is only a solution if the lines are identical
B
both the x–coordinate and the y–coordinate of the intersection point
C
the y–coordinate of the intersection point
D
the x–coordinate of the intersection point

Explanation

At the intersection, the two lines have the same y-value for the same x-value, so that x-value makes the two sides of the equation equal. Therefore, the solution is the x-coordinate of the intersection point, choice d.

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