Help me its a hard question please its on exammm!!:(

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Ineed with math stuff it involves graphs

Einstein office equipment has a rental plan for office machines. a fax machine that lists for $722.98 can be rented for 22% of the price annually. the state imposes a usage charge of 3.2%. if stephen hawking travel decides to rent the fax machine, what will its total monthly rental charge be?