Question 753940
With line y = 6x + 22
the gradient = 6
Another line that is perpendicular 
to y = 6x + 22 would have a gradient
of -1/6
 For perpendicular lines the gradients
multiply together to give -1
so, m1*m2 = -1
    6*-1/6 = -1
Using coordinates (0,4)
and the equation
y - b = m(x - a)   a = 0, b = 4
y - 4 = -1/6(x - 0)
y - 4 = -1/6x
    y = -1/6x + 4