Answer:
y=mx+c(what i learn't, but it doesn't make a difference) or y=mx+b
gradient = rise/run = (upward slope) [tex]\frac{2}{3}[/tex]
so y= [tex]\frac{2}{3}[/tex] x+c
to find c, input values for x and y, take any point from the graph.
(3,-2)
-2=(2/3)*3+c
-2=2+C
-4=c
so y=(2/3)x+(-4)
