PRICE IS 10 DOL, QS IS 50 UNITS, AND THE QD IS 100 UNITS. FOR EVERY 1 DOL RISE IN PRICE, QS RISES BY 5 UNITS AND QD FALLS BY 5 UNITSWHAT IS...

I will start by writing in full some terms given in the question in short form.

DOL = dollar ($), QS = quantity offered for supply, and QD = quantity demanded.

Coming to the answers to the question, the table below gives the QS and QD at different prices.

Price in $   QS      QD

10             50      100

11             55       95

12             60       90

13             65       85

14             70       80

15             75       75

16             80       70

17             85       65

From the above table we see that at price of 15 $ both QS and QD are 75 units.

Therefore:

Equilibrium price = 15 $, and equilibrium quantity = 75 units.