Does this represent a function?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Write the function for the graph. (1.8) (0,4)

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3