justinschrock18 justinschrock18 02-09-2021 Mathematics contestada The temperature of a city changed by −15 degrees Celsius over a 5-week period. The temperature changed by the same amount each week. Part A: Write an expression to show the average change in the temperature of the city each week. (5 points) Part B: Simplify the expression and explain, using words, what your answer means. (5 points)