Answer:
y=3x+3
How I got it:
from the graph, you can tell that the slope is 3/1, or 3 by counting up 3 on a point, then over 1.
Slope = 3
then you can tell the y intercept is 3 by.. well looking at where the line intercepts the y axis.
Y intercept = 3
the slope-intercept formula is:
y=mx+b
m being the slope, b being the y intercept. now you just plug in what you know!
y=3x+3, which is the answer