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Part of the graph of the function f(x) = (x – 1)(x + 7) is shown below. Which statements about the function are true?
(Select three options). (A)The vertex of the function is at (–4,–15). (B)The vertex of the function is at (–3,–16). (C)The graph is increasing on the interval x > –3. (D)The graph is positive only on the intervals where x < –7 and where x > 1. (E)The graph is negative on the interval x < –4.
(Answers are B C D)!!!!!

Respuesta :

Answer:

the answers are B,C,D

Step-by-step explanation:

For the graph of the function f(x)=(x-1)(x+7) , the statements which are true are:

B) The vertex of the function is at (-4,-15)

D) The graph is only positive where x<-7 and x>1

C) The graph is increasing on the interval x>3.

What is a function?

A function is a relationship between two variables. All values of x must have corresponding value in y.

How to check a function?

The given function is f(x)=(x-1)(x+7)

for checking whether the function is positive or not we have to put values less than -7 in the function.

f(x)=(-8-1)(-8+7)

=-9*-1

=9

means the graph is positive.

For checking whether increasing ar x>3. we have to put value more than 3

f(x)=(4-1)(4+7)

=5*11

=55

means increasing

Hence the right options are  B,C,D.

Learn more about function at https://brainly.com/question/10439235

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