Is this a function ? explain your reasoning.

please help !

How many grams the dog will eat in 3 days?

Which of the following circles have their centers on the x-axis? check all that apply.

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _