What is the equation of a line that has an undefined slope and runs through the point (3, 8)? x=8

x=3

y=8

y=3

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

15/16 as a decimal rounded to the nearest hundredth