Question

the slope of a line is -2/5. One coordinate is located at (6, -8) and the other coordinate is located at (a, -4). Use the slope formula to solve for y

Answer 1

a = - 4

Explanation:

(
`x_(1)` ,
`y_(1)` )

(
`x_(2)` ,
`y_(2)` )

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

~~~~~~~~~~

( 6 , - 8 )

( a , - 4 )

`(-4 +8)/(a-6)` = -
`(2)/(5)`

2( a - 6 ) = - 5( - 4 + 8 )

2a - 12 = - 20

2a = - 8

a = - 4