Answer:
h(x) increases by 15 units.
Step-by-step explanation:
Given that
[tex]h(x)=\frac{-5x}{7}-3\\ \\[/tex]
This is nothing but a straight line with slope equal = -5/7
Hence rate of change of y with respect to x =-5/7
Or for a unit increase in we have 5/7 decrease in h(x)
Using the above we find that when x decreases by 21
we have h(x) to increase by 21(5/7)
=15
So y increases by 15 units
