I can’t see it sorry maybe it’s my device
Answer:
This is a function
Step-by-step explanation:
If you do the Vertical Line Test you can see that the line passes through only one dot at a time. Therefore it is a function. If the line passed through more than one dot at a time then it wouldn't be a function.
Answer:
Step-by-step explanation:

To do 130% increase you multiply by 1.3 so you do 810 × 1.3 = 1053
No you had it right, it is around the 18 / 3 and the 5 + 1