What is the y-intercept of 6x+ 12y= 60? a. 5 b. 10 c .60 what is the slope of the line that contains the points (1, −1) and (−2, 8)? a. −3 b. 7 over 3 negative c. 1 over 3 negative

Problem 1

Plug in x = 0 and solve for y to get the y intercept

6x+12y = 60

6(0)+12y = 60

12y = 60

12y/12 = 60/12 ... divide both sides by 12

y = 5

A) 5

Problem 2

Use the slope formula.

The two points are (x,1, y1) = (1, -1) and (x2, y2) = (-2, 8)

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

m = (8-(-1))/(-2-1)

m = (8+1)/(-2-1)

m = 9/(-3)

m = -3

A) -3