16Hit1600
AlgebraEasy–MediumWhere a line crosses the x-axis

Algebra practice question

In the xy-plane, the line y = −3x + 12 crosses the x-axis at what value of x?

Answer: 4

Set y = 0: −3x + 12 = 0 gives x = 4.

Common wrong answers

If you answered 12
12 is the y-intercept.
If you answered -4
−4 has the sign wrong.
If you answered -3
−3 is the slope.

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