Question

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

Answer 1

Answer:

The equation is:

• y = mx + b

We have two points:

• (310, 68) and (620, 99)

A)

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

B)

Find the value of y when x = 980:

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

The total cost is $135