An amusement park charges an entrance fee plus an additional charge per ride that a person goes on. The park would like to model the total amount, a, a person will pay as a function of the number of rides, r, they go on. Amelia went on 7 rides and paid a total of $49.50. Lucas went on 12 rides and spent a total of $67.00. Write the information given as (x, y) pairs where the input is the number of rides and output is the total amount spent. ​

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.