Slope-intercept form is y = mx + b
The slope can be found by dividing y(2) - y(1) by x(2) - x(1).
4 - 3 = 1
2 - 0 = 2
m = 1/2
Since the first point has an x-coordinate of 0, the y-coordinate is the y-intercept of the line.
b = 3
Equation: y = 1/2x + 3