Question

Guided Practice

Find the range of the function rule y = 5x – 2 for the domain.


{–1.2, 0, 4}


A.
{–8, –2, 18}


B.
{–4, 2, 22}


C.
{0.16, 0.4, 1.2}

Answer 1

A. {–8, –2, 18}

Explanation:

y = 5x − 2

x = −1.2 ----> y = 5(−1.2) − 2 = −6 − 2 = −8

x = 0 -----> y = 5(0) − 2 = 0 − 2 = −2

x = 4 -----> y = 5(4) − 2 = 20 − 2 = 18