Question

A function f is defined by f(x) = 2x -5. Write down the values of f(-3).

Answer 1

f(x) = 2x - 5
Therefore,
f(-3) = 2(-3)-5 = -6-5 = -11

Answer 2

f(x) = 2x - 5

To find f(-3), we substitute the value of x as -3

f(x) = 2x - 5

f(-3) = 2(-3) - 5

f(-3) = -6 - 5

f(-3) = -11

Answer: -11ºF