I need help with my homework question I just need the answer for to see if my answer is correct​

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

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

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?