Question

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

Answer 1

Answer:

$y=\frac{8x}{1}-7$

Step-by-step explanation:

(1,1) and (2,9)

$\frac{9-1}{2-1}$ =$\frac{8}{1\\}$

(2,9) and (x,y)

$\frac{y-9}{x-2} =\frac{8}{1} \\\\1(y-9)=8(x-2)\\\\\frac{1y}{1}-\frac{9}{1}=\frac{8x}{1}-\frac{16}{1}\\\\y=\frac{8x}{1}-16+9\\y=\frac{8x}{1}-7$

Answer 2

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