y = mx + b slope(m) = -5/4 use either of ur sets of points....(0,5)...x = 0 and y = 5 now we sub and find b, the y int 5 = -5/4(0) + b 5 = b so ur equation is : y = -5/4x + 5...but we need it in standard form...
y = -5/4x + 5 5/4x + y = 5....multiply everything by common denominator of 4 5x + 4y = 20 <== standard form of Ax + By = C
