How is the building code for using asphalt shingles on a roof related to the definition of slope

Which statements regarding the diagram are true? check all that apply.

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60