Question

Help with this equation plzz

Answer 1

D

Explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y =
`(1)/(3)` x - 2 ← is in slope- intercept form

with slope m =
`(1)/(3)`

Given a line with slope m then the slope of a line perpendicular to it is

`m_(perpendicular)` = -
`(1)/(m)` = -
`(1)/((1)/(3) )` = - 3 , then

y = - 3x + c ← is the partial equation

To find c substitute (4, - 7) into the partial equation

- 7 = - 12 + c ⇒ c = - 7 + 12 = 5

y = - 3x + 5 → D

Answer 2

option C I think

Explanation:

I remember learning about this last year