Question

A function f is defined by f(x) = 2x – 5.

Write down the values of

(i) f(0),

(ii) f(7),

(iii) f(–3)

Answer 1

The given function is f(x) = 2x – 5. 

Therefore, 

(i) f(0) = 2 × 0 – 5 = 0 – 5 = –5 

(ii) f(7) = 2 × 7 – 5 = 14 – 5 = 9 

(iii) f(–3) = 2 × (–3) – 5 = – 6 – 5 = –11