3 years ago

Given the function f(x) = x2 and k = –1, which of the following represents a function opening downward?

1 answer:

5 0

f(x) = ax2+bx+c, is quadratic equation
function opening downward if the a<0,
kf(x) = -x², a= -1<0
so the answer is B.kf(x)

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