To solve the equation -24 = -y/6, which operation is used to isolate the variable y?
A: addition
B:division
C:subtraction
D: multiplication

D. Multiplication

Step-by-step explanation:

To solve the equation

-24=-y/6

We multiply by -6 in order to isolate the variable

-24×-6=(-y/6)×-6

144=y

OR

y=144

y = 1/3x -1

Step-by-step explanation:

We have 2 points  (9,2)  and (42,13)

We can find the slope

m = (y2-y1)/(x2-x1)

   = (13-2)/(42-9)

  =11/33

  =1/3

The slope is 1/3

We can use the point slope form of the equation

y-y1 = m(x-x1)

y-2 = 1/3(x-9)

Distribute

y-2 = 1/3x -3

Add 2 to each side

y-2+2 = 1/3 x-3+2

y = 1/3x -1