I need help on number 5 please. will mark brainlist

step-by-step explanation:

i dont get

the answer is d

for problems like this theres an app, its photomath that explains the problem and gives the answer hope i

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