This equation is written in point-slope form.
In this equation we have the point (2, 12) and the slope of 4.
Slope-intercept form: y = mx + b
m = slope
b = y-intercept
Use the point (2, 12) to solve.
12 = 4(2) + b
12 = 8 + b
12 - 8 = 8 + b - 8
4 = b (y-intercept)
Hope This Helped! Good Luck!