Solve 5y - x = 1 for y such that y = mx + b so we can extract the slope. y = 1/5x + 1/5 Perpendicular lines have opposite signed reciprocal slopes. 1/5 would have an opposite signed (-) reciprocal (5) slope of -5
Now let's find b by substituting the values of y, m, and x into y = mx + b: -1 = -5(2) + b -1 = -10 + b 9 = b So the equation is y = -5x + 9 or 5x + y = 9
