Question

If a line goes through points (-2, 9) and (0, 3), what is its slope?

a. -1/3
b. -3
c. 3
d. 6

Answer 1

b

Explanation:

calculate the slope m using the slope formula

m =
`(y_(2)-y_(1) )/(x_(2)-x_(1) )`

with (x₁, y₁ ) = (- 2, 9 ) and (x₂, y₂ ) = (0, 3 )

m =
`(3-9)/(0-(-2))` =
`(-6)/(0+2)` =
`(-6)/(2)` = - 3

Answer 2

b. -3

Explanation:

slope = y2 - y1 / x2 - x1

= 3 - 9 / 0 + 2

= -6 / 2

= -3