Question

Find the range of the function for the given domain. f(x) = 2x +5; {-2,-1.0.1,2} What is the range?

Answer 1

The range of a function is the set of possible y values.

Replace x by each value of domain and solve for y:

f(x) = 2x+5

y=2x+5

x=-2

y= 2(-2)+5 = -4+5=1

x=-1

y= 2(-1)+5 = -2+5=3

x=0

y=2(0)+5=5

x=1

y=2(1)+5 = 2+5=7

x=2

y= 2(2)+5=4+5=9

Range: {1,3,5,7,9}