Algebra practice question

Answer: 20/7

The x-intercept of 4x − 9 = 0 is (9/4, 0); the slope from there to (4, 5) is 5/(4 − 9/4) = 5/(7/4) = 20/7.

Common wrong answers

If you answered 5/4

5/4 uses the origin as the second point.

If you answered 7/20

7/20 inverts the slope.

If you answered -20/7

−20/7 has the sign wrong.

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