Question

1. answer the following question to see what you know!
2. based upon the data in figure 2, the greatest change in yyyyy occurred at xxxxx values between:

a. 1950 to 1960.
b. 1960 to 1970.
c. 1980 to 1990.
d. 1990 to 2000.

Explanation:

Step1: Analyze the slope of the graph

The steeper the slope of the graph (in terms of change in \(YYYYY\) over \(XXXXX\)), the greater the change.

Step2: Compare the slopes for each time - interval

• For \(1950 - 1960\): The slope is positive but not the steepest.
• For \(1960 - 1970\): The slope is relatively gentle (either positive or a small - magnitude change compared to \(1980 - 1990\)).
• For \(1980 - 1990\): The slope is very steep (a large decrease in \(YYYYY\) over the \(XXXXX\) interval).
• For \(1990 - 2000\): The slope is gentle (a small change in \(YYYYY\) over the \(XXXXX\) interval).

Answer:

C. 1980 to 1990.