Question

giselle pays $210 in advance on her account at the athletic club. each time she uses the club, $15 is deducted from the account. model the situation with a linear function.

Answer 1

Answer:

The situation can be modelled by the function f(x)=210-15x. Where f(x) represents the amount of money on her account in $ and x the number of times she uses.

Step-by-step explanation:

As we know each linear function can be expressed as:

f(x) = mx + b

Where m is the rate of change, b the initial value and x the independent variable.  

In this particular example, Gisselle provides on $210 in her account at the beginning, that is the initial value m. As $15 is discounted for each time she uses the club, then 15$/times, represents the rate of the linear function.  

Answer 2

210-15x
x=number of times she go to the club