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The company charges a flat rate of $25 per month in addition they charge $0.05 for each minute of service.
A.write a linear equation for the monthly charge based upon the numberof minutes of service each month.
B.what is the slope?
C.what is the y-intercept?
D.what would be the change for 100 minute of service?
E.You Can afford a $55 phone bill each month. How long can you afford to talk on the phone each month?

PLEASE SHOW ALL THE WORK. PLEASE, PLEASE, PLEASE!!!

Respuesta :

merlynthewhizz
The gradient of a line shows the rate of change. The slope is m = 0.05
The fixed cost is for y-intercept, y = 25

The equation of the straight line is [tex]y=0.05x+25[/tex]

The cost of 100 minutes usage is [tex]y=0.05(100)+25=75[/tex]

[tex]y=0.5x+25[/tex]
[tex]55=0.5x+25[/tex]
[tex] \frac{55-25}{0.5}=x [/tex]
[tex]x=60 [/tex]