Question

Consider functions h and k

h(x)
-4
h
-2
2
2
X
I
-3
0
1 2 4
k (x)
-1 2 3 4 6
What is the value of x when (ko h)(z) = -1?
O A. 1
OB. 2
O C. -3
OD. 4

Answer 1

OA.1

Explanation:

Function: f(x)=3x+4

A

f(5)=3(5)+4=19

Input

Function

Output

To evaluate a function, use the input value, which is typically an x value, in the function. Then, perform all calculations to determine the output value, which is typically a y value.

Recall that a function is a rule that produces an output value from an input value.

A function can only have one y value for any given x value. A vertical line test can be used to check this; if a vertical line crosses more than two points on the function, it is not a function.