The graph below shows the size of a bird population over time.
A graph shows a line that represents bird population size over time. The line begins about a third of the way up the y-axis and goes to the right. The line goes up and down a little bit, but stays mostly steady.
A graph shows a line that represents bird population size over time. The line begins about a third of the way up the y-axis and goes to the right. The line goes up and down a little bit, but stays mostly steady.
One year, the amount of rainfall in the birds’ ecosystem was much higher than normal. This led to an increase in the amount of seeds available for the birds to eat.
Which of these graphs shows how the bird population likely changed as a result of the increased rain?
Choose 1 answer:
Choose 1 answer:
(Choice A) A graph shows bird population size over time. The graph has a solid line representing time before increased rain. The line becomes dashed to indicate time after increased rain. The solid line begins about a third of the way up the y-axis and goes to the right. It goes up and down a little bit, but stays mostly steady. The line then becomes dashed and increases sharply, to about two-thirds the way up the y-axis. The line then continues to the right, going up and down a little bit, but staying mostly steady.
A
A graph shows bird population size over time. The graph has a solid line representing time before increased rain. The line becomes dashed to indicate time after increased rain. The solid line begins about a third of the way up the y-axis and goes to the right. It goes up and down a little bit, but stays mostly steady. The line then becomes dashed and increases sharply, to about two-thirds the way up the y-axis. The line then continues to the right, going up and down a little bit, but staying mostly steady.
(Choice B) A graph shows bird population size over time. The graph has a solid line representing time before increased rain. The line becomes dashed to indicate time after increased rain. The solid line begins about a third of the way up the y-axis and goes to the right. It goes up and down a little bit, but stays mostly steady. The line then becomes dashed and continues in the same pattern, going up and down a little bit but staying mostly steady.
B
A graph shows bird population size over time. The graph has a solid line representing time before increased rain. The line becomes dashed to indicate time after increased rain. The solid line begins about a third of the way up the y-axis and goes to the right. It goes up and down a little bit, but stays mostly steady. The line then becomes dashed and continues in the same pattern, going up and down a little bit but staying mostly steady.
(Choice C) A graph shows bird population size over time. The graph has a solid line representing time before increased rain. The line becomes dashed to indicate time after increased rain. The solid line begins about a third of the way up the y-axis and goes to the right. It goes up and down a little bit, but stays mostly steady. The line then becomes dashed and decreases sharply, coming close to the bottom of the graph. Then, the line continues to the right, going up and down a little bit, but staying mostly steady.
C
A graph shows bird population size over time. The graph has a solid line representing time before increased rain. The line becomes dashed to indicate time after increased rain. The solid line begins about a third of the way up the y-axis and goes to the right. It goes up and down a little bit, but stays mostly steady. The line then becomes dashed and decreases sharply, coming close to the bottom of the graph. Then, the line continues to the right, going up and down a little bit, but staying mostly steady.