First, find the slope: m = (y2 - y1) / (x2 - x1)
x1 = 1/4 y1 = -1/2 x2 = 3/4 y2 = 2 --->
m = (2 - -1/2) / (3/4 - 1/4) = (5/2) / (1/2) = 5
Use the point-slope form for the equation of the line: y - y1 = m(x - x1)
y - -1/2 = 5(x - 1/4) ---> y + 1/2 = 5x - 5/4 ---> y = 5x -7/4