## anonymous one year ago 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. Part B: Simplify the expression and explain, using words, what your answer means.

1. anonymous

@Michele_Laino @texaschic101

2. Michele_Laino

here, by definition, the average change is: $\frac{{\Delta \theta }}{{\Delta t}} = \frac{{ - 15}}{5} = ...?$

3. Michele_Laino

correct!

4. Michele_Laino

yes!

5. Michele_Laino

the meaning of your answer is given by the subsequent statement: "we can suppose an average change of temperature about -3 degrees for each week"

6. anonymous

so i write ^ @Michele_Laino

7. Michele_Laino

the simplification is: $\frac{{ - 15}}{5} = - 3$