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

1 Answer
Apr 21, 2017

Answer:

#{-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}#