Question

Find the equation of the line below.

10
(4,8)
х
t(1,2)
- 10
10
- 10
O A. y = 2x
O B. y = 1x
O C. y = x
O D. ya

Answer 1

A) y = 2x

Explanation:

We are given the points (4,8) and (1,2).

`(2-8)/(1-4)=(-6)/(-3)=(6)/(3)=\boxed{2}`

The line passes through the origin.

Option A should be correct.

Hope this helps.

Answer 2

y=2x

Explanation:

The line passes through the origin, so the y-intercept = 0

the slope m can be found with

m = (y2-y1)/(x2-x1) = (8-2)/(2-1) = 2

Therefore the equation of the line is

y = 2x + 0 = 2x