How do you find the range of t(x)=2x-9 for the domain (-2,0,3,8)?

1 Answer
Jim G.
Apr 21, 2017

{-13,-9,-3,7}

Explanation:

The range is the values obtained for y from the given values in the domain.
To obtain these, substitute values from domain into t( x )

t(color(red)(-2))=(2xxcolor(red)(-2))-9=-4-9=-13

t(color(red)(0))=(2xxcolor(red)(0))-9=0-9=-9

t(color(red)(3))=(2xxcolor(red)(3))-9=6-9=-3

t(color(red)(8))=(2xxcolor(red)(8))-9=16-9=7

rArr" range is " {-13,-9,-3,7}

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