Rosy waxes 2/3 of her car with 1/4 bottle of car wax. at this rate what fraction of the bottle of car wax will rosy use to wax her entire car?

to wax 2/3 of car rosy used 1/4 of her bottle.

to wax 1 ( meaning whole car )fraction of bottle = ? = x

wax2/3           bottle1/4

wax1                  bottle = x

CROSS MULTIPLY

2/3 x = 1/4 x 1 

x =1/4 divided by 2/3

x = 3/8 of bottle of car wax to wax entire car.

hope it helped

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i believe that the answer is

b. y-1=-2(x-4)

hope this !