Question 3:
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
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
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