Question

- 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

Answer 1

to find the y- intercept, let x = 0, in the equation and solve for y

0 + 12y = 60 ( divide both sides by 12 )

y = 5 ← y -intercept → A

assuming the points are (1, 1 ) and (2, 8 )

to calculate the slope m use the gradient formula

m =
`(8-1)/(2-1)` = 7 ( none of the stated answers )