What did this person do wrong? I need this answered for points!

Is the following relation a function? x y 1 4 −1 −2 3 10 5 16 yes no

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?