Which expression represents the area of the shaded rectangle?

answer:

the first answer

step-by-step explanation:

if you look across there are 4 squares. 2 out of 4 are shaded. if you look vertically there are 5 squares. 4 out of 5 squares are shaded.

answer:

a

step-by-step explanation:

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