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BaLLatris [955]
2 years ago
15

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

Mathematics
1 answer:
11111nata11111 [884]2 years ago
8 0

Answer:

<u>The equation is:</u>

  • y = mx + b

<u>We have two points:</u>

  • (310, 68) and (620, 99)

A)

<u>Find the slope using these two points:</u>

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

<u>Use one of the points to find the y-intercept b:</u>

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

<u>The equation is:</u>

  • y = 0.1x + 37

B)

<u>Find the value of y when x = 980:</u>

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

The total cost is $135

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