Question

Emily researched the average prices of desktop PCs worldwide since 2000. She could only find data from 2005 to 2010. She created a scatter plot of the data and

drew a linear model.


Describe the Trend Line using the words: Slope, Rate of Change, Y-Intercept and Initial Value. (Must use each word for full credit)


What is the relationship between the average price of PCs and the number of years that have passed since 2000?

Answer 1

Answer: There is a linear relationship between the average price of PCs and the number of years that have passed since 2000.

Explanation:

From the given graph, we can see there is a straight line , which shows that there is a linear relationship between both quantities.

As the number years increases the average price of PCs decreases.

The given equation of the line is
`y=-39x+998`, which shows that the slope of the line is -39, i.e the rate of decrease in the average price of PCs with respect to the the number of years that have passed since 2000.