Find an equation of the line passing through the pair of points (4.9) and (3,5). Write the equation in the form AX + By = C.
Line equation y = mx + b
find slope, m m = (y1-y2)/(x1-x2) = 4/1 = 4
y = 4x + b sub in either of the points to find b = -7
y = 4x -7 re-arrange to requested form
4x - y = 7