Abag contains 6 blue marbles,3 green marbles, and 2 yellow marbles. ava will select a marble from the bag without looking. what is the probability that she will select either a green or a yellow marble?

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