Three friend earned more than 200 washing car. they paid their parents 28 for supplies and divided the redt of money equally . write an inequallity to find possible amounts each friend earned .identify what your variable represents

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