Which equation represents a proportional relationship?

A. y=-2x
B. -2x+3y=12
C. y=1/2x+3
D. -1x+2y=6

Which equation represents a proportional relationship?

C. y=1/2x+3

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you