y = mx + b is the equation of a line;
m = slope , b = y-intercept
m = 4 : so we have : y = 4 x +b
We are give a set of points which it passes through, we can simply plug them in:
-2 = 4(3) + b (3 is the x and -2 is the y)
Then: -2 = 12 +b -14 = b
The final equation is : y = 4 x - 14
The answer is: y = 4 x - 14
I hope this helps have a fantastic day!!