The graph shows data from a recent satellite internet connection. The cost was 90 cents at 10 minutes, and 180 at 20 minutes.

The connection service billed at a rate of how many cents per minute?

$0.90 / 10 = ?

To find the rate at which the connection service billed per minute, we need to calculate the change in cost for each additional minute.

First, we find the difference in cost for each time interval:

Cost difference = Cost at 20 minutes - Cost at 10 minutes
= 180 cents - 90 cents
= 90 cents

Next, we find the difference in time for each interval:

Time difference = Time at 20 minutes - Time at 10 minutes
= 20 minutes - 10 minutes
= 10 minutes

Finally, we calculate the rate at which the connection service billed per minute:

Rate per minute = Cost difference / Time difference
= 90 cents / 10 minutes
= 9 cents per minute

Therefore, the connection service billed at a rate of 9 cents per minute.