Is the relation a function? Why or why not? {(–1, 9), (0, –1), (–1, 4), (4, 9)}

Yes; there is only one domain value for each range value.
No; a domain value has two range values.
No; a range value has two domain values.
Yes; there is only one range value for each domain value.

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

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Factor the polynomial by its greatest common monomial factor.