2/8 of an hour is 15,and 2/6 of an hour is 20 minutes. 20-15 is 5 minutes
-2 because you have to reduce
Your first point would be on (0, 2), the vertex. Then, put a point on (-2, 22). Hope that helps!
I can solve with 2 methods:
I. Because the discount is 15 % of 18 $ , the price will be (100-15=85) 85 % of 18 $
18*85/100= 15,3 $ ( the sale price)
II. The discount is 15 % of 18$
15*18/100= 2,7$ ( the discount)
then I decrease it from the regularly price
18$-2,7$=15,3 $ (the sale price)
Personally I believe the first is an easier method.
I hope you understand and you can apply this in every similary problem.
