Question

Find the domain of y=2/3x-1 if the range is {-3, -1, 7, 17}.

Answer 1

plug in -3,-1,7,17 for y, and find the x.

For example.
lets first rearrange the equation (for all range and domain). (by multiplying both sides time (3x-1).

y(3x-1)=2

when the range is -3,

(-3)(3x-1)=2
-9x+3=2
-9x=-1
x= 1/9

So you would start filling in the domain as,
{1/9, ...... }


you just need to find the rest of the values of the domain.
When x=-1?
When x=7?
When x=17?

Answer 2

exactly..the domain is all the x values and the range is all the y values.
So if you are given a range of -3, and the range is the y values, then sub -3 in for y and solve for x, the domain.