Algebra practice question

Answer: 8

Slope = (1 − 4)/(6 − 0) = −1/2, so f(x) = 4 − (1/2)x. Set f(x) = 0: x = 8.

Common wrong answers

If you answered 4

4 is f(0), the y-intercept.

If you answered 6

6 is where f = 1, not 0.

If you answered -8

−8 has the wrong sign.

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