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Delvig [45]
3 years ago
7

The phone company NextFell has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of mon

ey per minute used on the phone. If a customer uses 110 minutes, the monthly cost will be $73.5. If the customer uses 760 minutes, the monthly cost will be $301. Find an equation in the form y = m x + b, where x is the number of monthly minutes used and y is the total monthly of the NextFell plan.
Mathematics
1 answer:
rosijanka [135]3 years ago
4 0

Answer:

y = 0.35x + 35

Step-by-step explanation:

Linear equation:

A linear equation has the following format:

y = mx + b

In which m is the slope and b is the y-intercept.

Finding the slope:

We have two points: (110, 73.5) and (760, 301).

The slope is given by the change in y divided by the change in x. So

Change in y: 301 - 73.5 = 227.5

Change in x: 760 - 110 = 650

Slope: m = \frac{227.5}{650} = 0.35

So

y = 0.35x + b

Finding the y-intercept:

(760, 301) means that when x = 760, y = 301. So

301 = 0.35(760) + b

b = 301 - 0.35(760)

b = 35

So

y = 0.35x + 35

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