A bakery sold 31 bagels in the first hour of business and 42 bagels in the second hour .If the bakery had 246 bagels to start with, how many bagels were left after the second hour

173 bagels are left

Step-by-step explanation:

31+42=73

246-73=173

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value