Question

Graph y=2.5x= what is the answer

Answer 1

well, here's how you can do this:

take any value y, then divide by 2.5 to get x

so, you can get (these are just a couple of pairs, they are an infinite number of pairs for any equation like this!):

if y=0

x=0

if y=2.5

x=1

if y=5

x=2

graph: