Answer:
A. y=10x+50
Step-by-step explanation:
you only add $50 once because it is the "become a member fee", you put a X next to the 10 because its monthly. (so you can replace the variable with any number if needed)
The irrational number that can be added to pi to get a rational sum is PI.
Solution:
It is given that , number of members f(x) in Joe's health club increased by 25% every year over a period of x years.
The relationship between f(x) and x is given as:

Replacing f(x) by y, in the above equation
y= 
To draw the graph without the help of Desmos, find diifferent value of y, for different values of x, For example , for x=1
We get , y=
= 18.75
For, x=2
y=
=15 × 1.5625=23.4375
For, x=3
y=
= 29.296875
So, for different values of x, we get different values of y. Mark these points in the coordinate plane, and join them . You will get the graph of the above function :⇒ f(x)= 
Graph is depicted below.