Drag each object to show whether cost is proportional to area in the situation represented.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.