Can someone tell me if is this a function or not?

Yes, it is a function.

Step-by-step explanation:

As long as there are no more than one point in a single x-value, it is considered a function.

answer: i guess 5 units?

step-by-step explanation:

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75