Question

use the bar graph to answer the questions. 1. how many cds were sold in january? 2. how many cds were sold in april? 3. how many more cds were sold in april than in january? 4. what is the trend? 5. if you wanted to predict the sales for may, what would your guess be?

Explanation:

Step1: Read January bar height

From the bar - graph, the height of the bar for January corresponds to 100. So, the number of CDs sold in January is 100.

Step2: Read April bar height

The height of the bar for April corresponds to 400. So, the number of CDs sold in April is 400.

Step3: Calculate the difference

To find out how many more CDs were sold in April than in January, we subtract the number of CDs sold in January from the number of CDs sold in April. $400 - 100=300$.

Step4: Analyze the trend

By observing the heights of the bars for January, February, March, and April, we can see that the number of CDs sold is increasing each month. So the trend is an increasing trend.

Step5: Make a prediction

Since the trend is increasing, a reasonable guess for May's sales could be 500 (assuming the increase continues at a somewhat steady rate, for example, an increase of about 100 each month as seen from January - April).

Answer:

1. 100
2. 400
3. 300
4. Increasing trend
5. 500