Answer:
The y-intercept is:
(0,18)
Step-by-step explanation:
It is given that:
Jackson pays $18 per month for his phone service, plus $0.07 for each long distance minute used.
Let t be the long distance minutes used.
Let 'C' be the cost function that calculates the cost of the phone service.
This means that we an form a liner equation that models this situation as:
C=18+0.07t
Let the cost function is represented by the y-axis and the time i..e number of long distance minutes is represented on the x-axis.
Now we know that y-intercept is a point on the y-axis where x-value is zero.
i.e. here t=0.
When t=0 we get:
C=18.
Hence, the y-intercept is:
(0,18)
