Question

if the temperature outside was -4 degrees Fahrenheit in the morning and 13 degrees Fahrenheit in the afternoon by how much did the temperature increase

Answer 1

on a number line start at -4 and go in the direction of right for 13 units you will end up at 9

Answer 2

the temperature increased 17 degrees.

to add the difference of a negative and positive number, i added the absolute value of -4 (4) to the larger number (13) and got 17