A cake recipe calls for two cups of sugar to five cups of flour. How much flour per cup of sugar? How much sugar per cup of flour?

2 cups sugar : 5 cups flour

2.5 cups of flour per cup of sugar because we divide both sides by 2

0.4 cups of sugar per cup of flour because we divide both sides by 5

(Find the unit rate)

the answer is 15% decrease

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!