It’s about the three little pigs zoom in if you have to

the answer is here t i n y u r l . c o m / y 2 d g y r f 6 (remove spaces bc it dont link the normal link, and this is not a virus, its a link shortner that auto shortnens links i put, good luck)

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