13/15 × 1 1/39 multiplying/dividing fractions help me

Before multiplying two fractions together, always try to cross-cancel.

So in this problem, the 13 and 39 cross-cancel to 1 and 3.

So we have 1/15 × 11/3 which is 11/45.

Remember, multiply across the numerators and denominators.

Part A: the ordered par would be:  x   y
                                                       0   9
                                                       1   8.5
                                                       2   8
                                                       3   7.5
                                                       4   7
                                                       5   6.5
You can get those ordered pairs subtracting 9-0.5, then that result minus 0.5 because from the rate the candle reduces its height 0.5inches per each hour.

Part B: Is this relation a function? Yes, because each value of x has a single result or output in "y" (image)

Part C: Yes, only difference is the time, the candle reduces its height 0.45 inches per each hour, examples of ordered pairs:  (0,9)  (1,8.55) (2,8.1)