Question

A line includes the points (1, 1) and (2, 9). What is its equation in slope-intercept form?

Answer 1

3rd option should be correct from slope intercept form 2,9

Answer 2

`y=(8x)/(1)-7\\`

Explanation:

(1,1) and (2,9)

`(9-1)/(2-1)` =
`(8)/(1\\)`

(2,9) and (x,y)

`(y-9)/(x-2) =(8)/(1) \\\\1(y-9)=8(x-2)\\\\(1y)/(1)-(9)/(1)=(8x)/(1)-(16)/(1)\\\\y=(8x)/(1)-16+9\\y=(8x)/(1)-7`