Answer
a) f increases by 2.3 units for every 1 unit of increase in x.
b) f decreases by 1.4 units for every 1 unit of increase in y.
c) f decreases by 2.5 units for every 1 unit of increase in z.
Work Step by Step
a) f increases by 2.3 units for every 1 unit of increase in x.
As x has a 2.3 coefficient in the function
b) f decreases by 1.4 units for every 1 unit of increase in y.
As y has a -1.4 coefficient in the function
c) f decreases by 2.5 units for every 1 unit of increase in z.
As z has a -2.5 coefficient in the function
