What percent is represented by the shaded area?

52%

Step-by-step explanation:

There are 52 squares colored in. 52 divided by 100 equals 0.52. Then multiply the 100 back to 52 to get 52%.

21

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