Question

The slope of line that passes through the points (20,30) and (40,14) is

a) -5/4
b) -4/5
c) 4/5
d) 5/4

Answer 1

B

Explanation:

calculate the slope m using the slope formula

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

with (x₁, y₁ ) = (20, 30 ) and (x₂, y₂ ) = (40, 14 )

m =
`(14-30)/(40-20)` =
`(-16)/(20)` = -
`(4)/(5)`