An 8 by 10 inch piece of cardboard cost $ 2.00. if the cost of the cardboard is proporcional to its area what is the cost of piece of cardboard that is 16 inches by 20 inches?

$4

The cost of an 8x10 piece is $2, and 16x20 is just 2 times that amount, multiply the cost.

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.