Question

the stacked line chart shows the numbers of college degrees awarded to males and females since 1970. complete parts (a) through (d).

a. estimate the numbers of college degrees awarded to males and to females (separately) in 2020.
the number of college degrees awarded to males in 2020 was 770,000. the number of college degrees awarded to females in 2020 was 1,193,000.

b. about when were the numbers of college degrees equal for males and females?
they were approximately equal in
1980.
1990.
2010.
2000.
1970.
2020.

Explanation:

Understand the stacked line chart structure

Using the Stacked Line Chart Interpretation knowledge point
In a stacked line chart, the values are plotted cumulatively.

• The bottom region (cyan) represents the number of degrees awarded to males.
• The top region (purple) represents the number of degrees awarded to females, stacked on top of the male values.
• The vertical distance (thickness) of each colored band represents the actual value for that group.

Analyze when the values are approximately equal

Using the Stacked Line Chart Interpretation knowledge point
For the numbers of degrees awarded to males and females to be equal, the thickness of the cyan band (males) must be approximately equal to the thickness of the purple band (females).

• In 1970: Cyan height is about \(5\) units (\(500,000\)), purple height is about \(3\) units (\(300,000\)).
• In 1980: Cyan height is about \(5\) units (\(500,000\)), purple height is about \(4\) units (\(400,000\)).
• In 1990: Cyan height is about \(5\) units (\(500,000\)), purple height is about \(5\) units (\(500,000\)). The total height is at \(10\), with the cyan line at \(5\), meaning both groups have equal values of approximately \(500,000\).
• In 2000: Cyan height is about \(5\) units (\(500,000\)), purple height is about \(7\) units (\(700,000\)).
• In 2010: Cyan height is about \(7\) units (\(700,000\)), purple height is about \(9\) units (\(900,000\)).
• In 2020: Cyan height is about \(7.7\) units (\(770,000\)), purple height is about \(11.9\) units (\(1,190,000\)).

Thus, the two bands have the most equal thickness around the year 1990.

Answer:

• 1980.
• 1990. (Correct answer)
• 2010.
• 2000.
• 1970.
• 2020.