If the range of the function f(x) = 4x – 3 is {11.4, 15, 17, 29}, what is its domain?

Question

anonymous · Answer

A. {1.5, 2.8, 5.5, 7}
B. {2.3, 4, 8, 11}
C. {7, 11, 13.2, 14}
D. {3.4, 5, 8, 9.3}
E. {3.6, 4.5, 5, 8}

jdoe0001 · Answer

http://www.mathwarehouse.com/algebra/relation/images2/domain-range-picture.gif

anonymous · Answer

???

jdoe0001 · Answer

hmmm I see hehe

anonymous · Answer

Lol do you know the answer please?

ivettef365 · Answer

you need to find f(x) when x = 11, 4, 15 .......

jdoe0001 · Answer

what is really saying is that 
in f(x) = 4x – 3 ==> y =  = 4x – 3
if "y" equals all these values below, one at a time
 {11.4, 15, 17, 29}

what will be the value of "x"

so say let's pick the 1st 2 values
"y = 11"

11 = 4x -3
# solving for "x"
14 = 4x   => 14/4 = x

now if "y = 4"

4 = 4x -3
# solving for "x"
7 = 4x   => 7/4 = x

anonymous · Answer

Can it be plugged into a graphing calculator?

jdoe0001 · Answer

sure

jdoe0001 · Answer

but I think you're expected to solve for "x" anyway