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Given the function f(x) = x2 and k = –1, which of the following represents a function opening downward? A. f(x) + k B.kf(x) C. f(x + k) D. f(kx)

Given the function f(x) = x2 and k = –1, which of the following represents a function opening downward? A. f(x) + k B.kf(x) C. f(x + k) D. f(kx)
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Given the function f(x) = x2 and k = –1, which of the following represents a function opening downward?

A. f(x) + k
B.kf(x)
C. f(x + k)
D. f(kx)

asked
User Dan Weber
by
8.3k points

2 Answers

4 votes

Answer:

kf(x)

Explanation:

I got it right.

answered
User Nephtes
by
8.5k points
5 votes
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)

answered
User GAgnew
by
8.0k points
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