Joe and Shane compare their monthly text message plans. Joe plan cost $14 plus an additional $0.08 per
text. Shane plan cost $0.15 per text.
In one month they paid the same amount. What was
the number of text messages they sent?

The cost varies directly with the number of tickets purchased. it costs $145 for 10 people to attend a concert. a. what is the constant of proportionality (k)? b. write the direct variation equation. c. home much does it cost for 8 people? d. graph this situation. be sure to label each axis and give the graph a title.