If y varies directly as x, find y:
{(8, -12). (20, y)}

y = - 8

Step-by-step explanation:

If

y

varies directly with

x

, an equation to express this can be:

y

=

m

x

1

. Since

y

=

4

when

x

=

12

, substitute the values into

y

=

m

x

to determine the value of

m

.

y

=

m

x

4

=

m

(

12

)

m

=

1

3

y -5 = (-1/4)(x + 8)

step-by-step explanation: