What is the range of the function #2x + y = 7# if the domain is (-4, -2, 0, 5, 7)?

1 Answer
Jan 14, 2017

Answer:

#(-7,-3,7,11,15)#

Explanation:

Since it is not clear which the independent variable is, we will assume that the function is

#y(x) = 7 - 2x# and NOT #x(y) = (7-y)/2#

In this case, simply evaluate the function at each #x# value of the domain:

#y(-4) = 15#
#y(-2) = 11#
#y(0) = 7#
#y(5) = -3#
#y(7) = -7#

Therefore, the range is #(-7,-3,7,11,15)#.