Are these graphs functions?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!

The slope of the line whose equation is 3y = 2x - 3 is 2 2/3 3/2