Question: A plane has equation z = 5 x + 3 y + 4 . ( a ) By how much does z increase if x

A plane has equation z =5x +3y +4.
(a) By how much does z increase if x is increased by one? (Give an exact answer.)
(b) By how much does z increase if y is increased by one? (Give an exact answer.)
(c) By how much does z increase if x is increased by 5 and y is increased by 2?(Give an exact answer.)

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