Could someone show me the steps to get this answer?

confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.

f(x) = (x-9)/(x+5)

g(x) = (-5x-9)/(x-1)

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

idk

step-by-step explanation: