The graph shows the number of sales people working and the total of number of cars sold over the last 18 days.

There will be 9 salespeople working tomorrow.
By estimating the line of best fit, which value is the best estimate for how many cars will be sold tomorrow?

A.)25 B.)30 C.)35 D.)40

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?