Mrs. Carl is teaching her class to add positive and negative integers. She asks her students to write a rule to generalize what they have learned. Paulina says that when adding a positive integer and a negative integer, the sum is always positive. Katrina says this is false but cannot think of a counterexample to make her point.

A. Which student is correct? Explain.

B. Write a rule for adding positive and negative integers.

Mrs. Carl’s Class