Two classes are going to combine to do a project together. the first class has 24 students and the second class has 21 students. if they divide all of the students from the two classes up into 3 groups, how many students will be in each group?

ok thats very interesting

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