9. Answer: It's a proportional relationship, since every hour he charges $6.25.
Work: there is no work, but you did need the linear equation, which you have written in question 11,
10. Answer: Ratio of how much Steven charges per hour,
[tex] \frac{6.25}{1} [/tex]
Work:
[tex] \frac{50 - 31.25}{8 - 5} = \frac{18.75}{3} = \frac{6.25}{1} [/tex]
12. Answer: $18.75
Work:
[tex]y = 6.25(x) \\ y = 6.25(3) \\ y = 18.75[/tex]
