Polygon ABCD has the following vertices: A(−4, 2), B(3, 2), C(3, −5), and D(−4, −2) Calculate the area of the polygon. 28 units squared 38.5 units squared 40.5 units squared 49 units squared

28 squared =784.

38.5 squared=1,482.25

40.5 squared=1,640.25

49 squared=2,401

Step-by-step explanation:

c

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