3 years ago

The phone company A Fee and Fee has a monthly cellular plan where a customer pays a flat

Mathematics

1 answer:

11111nata11111 [884]3 years ago

8 0

Answer:

The equation is:

y = mx + b

We have two points:

(310, 68) and (620, 99)

Find the slope using these two points:

m = (99 - 68)/(620 - 310) = 31/310 = 0.1

Use one of the points to find the y-intercept b:

68 = 0.1*310 + b
68 = 31 + b
b = 68 - 31
b = 37

The equation is:

y = 0.1x + 37

Find the value of y when x = 980:

y = 0.1*980 + 37
y = 98 + 37
y = 135

The total cost is $135

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