Question

On a coordinate plane, a step graph has horizontal segments that are each 1 unit long. The x-axis is labeled Talk time in minutes and the y-axis is labeled cost in cents. The left end of each segment is an open circle. The right end of each segment is a closed circle. The left-most segment goes from (0, 1) to (1, 1). Each segment is 1 unit higher and 1 unit farther to the right than the previous segment. The right-most segment goes from (4, 5) to (5, 5).
The cost of a long-distance phone call, in cents, can be modeled by the ceiling function whose graph is shown.

How much does it cost to talk for 3.1 minutes?

Answer 1

It will cost $0.04 i.e. 4 cents to talk for 3.1 minutes.

Step-by-step explanation:

The x-axis is labeled Talk time in minutes and the y-axis is labeled cost in cents. The left end of each segment is an open circle. The right end of each segment is a closed circle. The left-most segment goes from (0, 1) to (1, 1). Each segment is 1 unit higher and 1 unit farther to the right than the previous segment. The right-most segment goes from (4, 5) to (5, 5).

Therefore, the model equation for the cost of long-distance phone calls is given by

y = [x], defined by for 0 < x ≤ 1, y = 1, for 1 < x ≤ 2, y = 2, for 2 < x ≤ 3, y = 3 and so on.

Now, it will cost $0.04 i.e. 4 cents to talk for 3.1 minutes. (Answer)

Answer 2

Answer: c-4 cents

Step-by-step explanation: because ed2020