Question

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Answer 1

well what happens to 2x(4-y) when you replace y with 4

Answer 2

by the way 2x(4-y) represents the slopes of the little lines in the slope field

Answer 3

and then also ask yourself what happens to 2x(4-y) when you replace x with 0

Answer 4

so both come out to 0

Answer 5

is it both the first and second?

Answer 6

yep we get the slopes are 0 for either y=4 or x=0
slopes being 0 meaning horizontal tangents

Answer 7

Thank you!