Advanced Math practice question

Answer: 2

Substitute the point (4, 11): 11 = a(4 − 2)² + 3, so 11 = 4a + 3, 4a = 8, a = 2.

Common wrong answers

If you answered 1

With a = 1 the point would give 1(4) + 3 = 7, not 11.

If you answered 4

4 is (4 − 2)², the squared bracket, not a. Subtract 3 from 11 and divide by 4: a = 2.

If you answered 8

8 is 11 − 3, the value of 4a. One more step: divide by 4.

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