Esmerelda bought a bag of jelly beans. there were 24 green jelly beans, which made up 8%, percent of all the jelly beans in the bag.
how many jelly beans were in the bag?

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x