Advanced MathHardLeading coefficient from the y-intercept
Advanced Math practice question
The function f is defined by f(x) = a(x − 2)(x − 6), where a is a constant. If the graph of f passes through (0, 24), what is the value of a?
Answer: 2
f(0) = a(−2)(−6) = 12a = 24, so a = 2.
Common wrong answers
- If you answered 12
- 12 is (−2)(−6).
- If you answered 24
- 24 is f(0).
- If you answered -2
- −2 treats (−2)(−6) as −12.
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