Answer:
y=8
Step-by-step explanation:
The equation: y=mx+c
First you have to turn this equation into a proper equation (y=mx+c).
m = gradient
c = y-intercept (where the line goes through the y-axis).
To turn this into a proper equation, you have to isolate the y by subtracting 5 from both sides (because whatever you do to one side, you have to do the same to the other side).
So you subtract 5 by 5 and subtract 5 from 13. *You do not subtract 5 from 6x.
This will give you and answer of y=6x+8.
m = gradient = 6
c = y-intercept = 8
So the value of y is 8.