Question

Given the slope and y-intercept can you write an equation for the line?

Answer 1

Yes, because the equation to find the proportional relationship is y=kx. Y- origin
K- constant rate of proportionality

Answer 2

y=mx+b
m=slope
b=yintercept

example
if slope=3
yintercept is 2 then
y=3x+2
simple as that