Question

The points (6, -3) and (14, r) lle on a line with slope 1/2
Find the missing coordinate r.

Answer 1

r = 1

Explanation:

(6, -3) ; (14, r)

Slope =
`(y_(2)-y_(1))/(x_(2)-x_(1))`

`(r-[-3])/(14-6)=(1)/(2)\\\\(r + 3 )/(8) = (1)/(2)\\`

Cross multiply,

(r + 3)*2 = 1*8

2r + 6 = 8 {Subtract 6 from both sides }

2r = 8 - 6

2r = 2 {divide both sides by 2}

r = 2/2

r = 1