Question

The temperature of a city changed by −20 degrees Celsius over a 4-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.

Part B: Simplify the expression and explain, using words, what your answer means.

Answer 1

Let's say that the temperature it changed is x.


4 (x) =-20.

So basically we're dividing -20 by four, because the temperature changed by -20 degrees over four weeks, so the answer is -5.