How do you do number 16 a and b. show work and with a answer

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.

What is the slope of the line that contains the points (-2,1) and (0,-3)

What is y-5=3(x+1) in slope intercept form