and
so

and you rationalize denominator by multiplying numerator and denominatr by
so that gives--

Your answer is 
72.00/0.25 = 288 then 288/2 = 144 and you would then do 1.25 x 144 = 180,
Phil baked 180 cookies
We have no idea how 'b' is related to the parent function, or to the graph,
or to anything else, so no answer is possible. From just the information
given in the question, 'b' has no effect whatsoever on the graph, or on
how much rain Chicago will get next week.or on how much my dog will
eat tonight.
A. But you can also read a book and not rely on this