Vastaus: # 2y = 7x + 1 # Selitys: #r: y = ax + b # on kohtisuorassa # y = (-5 - 2x) / 7 # # -1 / a = -2 / 7 # #a = 7/2 # # (- 1, -3) r Rightarrow -3 = 7/2 * (-1) + b # #b = -3 + 7/2 = 1/2 # #r: y = 7/2 x + 1/2 #