NEED HELP ASAP RIGHT NOW

John sells ice cream bars at the beach. In addition to a fixed salary, he earns a commission for each ice cream bar he sells. The table shows John's total earnings, y, from selling x bars of ice cream:

Ice Cream Sales and Earnings
Number of Bars Sold (x) Total Earnings (dollars) (y)
0 40

1 44

2 48

3 52

Which equation best shows the relationship between x and y?
y = x + 44
y = 4x + 44
y = x + 40
y = 4x + 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?

3x + 4y = 5 x- 3y = -7 solve by substitution

Line ab contains points a(4, 5) and b(9.7). what is the slope of ab?