Question

In what direction does the function f(x)=−(14x−1)(4x+1) open? Explain.

Answer 1

Answer: Direction opens downward

Explanation:

X-Intercept: (1/14,0),(-1/4,0)

Y-Intercept: (0,1)

Find the vertex using x= -b/2a

Plug it into the vertex form = y=a(x-h)^2 +k

H,K will identify the direction.