Question

The Slope of the line joining points (12; 3) and (4; a) is 1 8 . Find the value of a

Answer 1

Given points are

(x1,y1) = (12,3)

(x2,y2) = (4,a)

slope(m) = a

Now, m = (y2-y1) / (x2-x1)

or, a = (a-3)/(4-12)

or, a = (a-3)/-8

or, -8a = a-3

or, -8a-a = -3

or, -9a = -3

or, a = -3/-9

= 1/3