Question

(x, 1) and (-3, 7); slope: -3

Answer 1

x = - 1

Explanation:

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

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

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

~~~~~~~~~~~~~

Assume,

x =
`x_(1)`

1 =
`y_(1)`

- 3 =
`x_(2)`

7 =
`y_(2)`

m = - 3

then

`(7-1)/(-3-x)` = - 3

- 3 - x = 6 ÷ ( - 3 )

- 3 + 2 = x

x = - 1