I have to find the correlation and the linear regression for the data

Name the most appropriate metric unit for each measurement

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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.