Ineed with the first one asap and i also need to show work too so if you can explain it to me that would be great

the correct answers i think are b. and d.

give me brainliest if it is correct!

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blogan.20174

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