Question 1019014
Hi there,
Gradient (Slope) of BC = y2 - y1/x2 - x1
= -2 -4/5 - 3
= -6/2
= -3
Lines at right angles to one another
have gradients (slopes) that multiply
together to give -1
m1 x m2 = -1
-3 x m2 = -1
m2 = 1/3
This is the gradient of the altitude.
Using line equation
y - b = m(x - a)
with m = 1/3 and A (0,0) = (a,b)
y - 0 = 1/3(x - 0)
y = 1/3x
This is the equation of the altitude
Hope this helps :-)