Suppose the point $(9,-8)$ is on the graph of a function $f(x)$. What point must be on the graph of each of the following functions?
a) $f(-x)+5$

b) $f(8 x - 10)$

c) $\dfrac{1}{8}(f(x)+5)$

d) $6 f\left(\dfrac{1}{7}(x+9)\right)-10$

Hint: