Question

An international calling plan charges a rate per minute plus a connection fee. You can make a phone call from France to the United States for $0.22 per minute plus a $0.99 connection fee. Write a linear equation that could be used to represent the cost of an x minute phone call.

Answer 1

y=0.22x+0.99

Explanation:

Notice that in this problem they are giving us a rate $0.22 per minute. This means that whenever we multiply that rate by the number of minutes used, we will get the total amount of money spent. In this case, since we don't know the amount of minutes (variable) we will call them x, so the first part of the equation should be:

0.22x

the connection fee is $0.99, which means that no matter the time you take talking by the phone, you will be charged a constant value of $0.99, so we can add that to the previous value we got:

0.22x+0.99

and for the equation to be complete, we can set variable y= to the total cost of the call, so the whole equation would be:

y=0.22x+0.99