The variables y and x have a proportional relationship, and y = 5 when x = 4.
what is the value of x when y = 8?

If the variables y and x have a proportional relationship, we have

Since (x,y)=(4,5) is a valid pair, we know that

So, if y = 8, we have

answer:

c. the third graph

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb