Question

alexandra kept a tally of the number of emails she received each day for a week. emails alexandra received according to the graph, when was the rate of decrease greater? between monday and tuesday

Explanation:

Step1: Calculate rate of decrease between Monday - Tuesday

The number of emails on Monday is 7 and on Tuesday is 4. Rate of decrease = $\frac{7 - 4}{7}=\frac{3}{7}\approx0.429$.

Step2: Calculate rate of decrease between Wednesday - Thursday - Friday

The number of emails on Wednesday is 6, on Thursday is 2 and on Friday is 1. First, rate of decrease from Wednesday - Thursday = $\frac{6 - 2}{6}=\frac{4}{6}=\frac{2}{3}\approx0.667$. Then from Thursday - Friday = $\frac{2 - 1}{2}=\frac{1}{2}=0.5$. The overall rate of decrease from Wednesday - Friday is more complex to calculate exactly but we can see that the decrease from Wednesday - Thursday alone ($\frac{2}{3}$) is greater than $\frac{3}{7}$.

Answer:

between Wednesday and Thursday