Question

What is the range of the function f(x) = 4x + 9, given the domain D = {-4, -2, 0, 2}? please help

Answer 1

Since this is a linear function, filling in the minimum and maximum of the domain is sufficient.

f(-4) = -16 + 9 = -7
f(2)= 8 + 9 = 17

So the range of the function (given the domain) :
R = {-7, 17}