Answer: a. The y-intercept is 30. This is the cost of registration.
Step-by-step explanation:
The standard equation of line in intercept form is given by :-
, where m is the slope of the line and c is the y-intercept.
Given : Sara plotted the data and determined that the average gym costs consist of a one-time registration fee and a monthly fee modeled by the equation :-
By comparing it to the equation (i), we have
c=30 and m=10
i.e. The y-intercept is 30.
Also, y-intercept of any function shows the starting value of the function when x=0.
Thus, This is the cost of registration ( starting fee).