Question

What is the range of f(x) = 3x + 9?

Answer 1

Answer: -21, -18, -9, -6, 15

Step-by-step explanation:
The range is all the values the function can achieve by using x in from its domain, so we just plug in all the numbers in the domain here;

f(-4) = 3(-4) -9 = -12 -9 = -21

f(-3) = 3(-3) -9 = -9 -9 = -18

f(0) = 3(0) -9 = 0 -9 = -9

f(1) = 3(1) -9 = 3 -9 = -6

f(8) = 3(8) -9 = 24 -9 = 15

So the range is the set {-21, -18-, -9, -6, 15}

Answer 2

The range of function f(x) is all real number.

Step-by-step explanation:

Given:
`f(x)=3x+9`

It is linear equation.

Domain is input value of x where function is well defined.

Range is output value of y for all defined value of x.

Range is all real number of linear equation.

Linear function is a straight line whose defined for all value of x.

`\text{Range: }(-\infty,\infty)`

Hence, The range of f(x) is all real number.