P(1, 2), Q(3, 4) we find the slope dividing the y over the x, that is: m = (4 - 2)/(3 - 1) = 2/2 m = 1 and then use the line equation for a point and slope: y - y1 = m(x - x1) where (x1, y1) is a point through which the line passes, we use P(1,2): y - 2 = 2(x - 1) y - 2 = 2x - 2 y = 2x therefore the slope is 2 and the y-axis intercept is 0
