Question

graphs, graphs, graphs
students hours studied and grade on test 1

1. what kind of graph is this?
2. what is the independent variable?
3. what is the line running through the middle of the graph called?
4. is there a relationship being showed? if so, what is the relationship?
5. if olivia studied 9 hours for test 1, approximately what grade should she receive?

the growth of a pine tree over 50 years

1. what kind of graph is this?
2. what is the dependent variable?
3. what is this graph representing?
4. when the tree is 25 years old, how tall is it?
5. if the tree continues to live until it is 60, approximately how tall will it be?

given is a set of data for an experiment that measured the height of nine sunflowers after a 4 - week period. they scientists wondered if the amount of sunlight given daily to a sunflower would affect its height.

Explanation:

1. The graph with points and a line is a scatter - plot with a line of best fit.
2. The independent variable is the one that is controlled or changed, here it's hours studied.
3. The line running through the middle of the scatter - plot is called the line of best fit which represents the general trend.
4. There is a positive relationship as more hours studied is associated with higher grades.
5. By looking at the line of best fit, for 9 hours of study, the grade is around 90.

For the pine - tree graph:

1. It is also a scatter - plot with a line of best fit.
2. The dependent variable is the one that is measured, here it's the height of the tree.
3. It represents the growth of a pine tree over 50 years.
4. By looking at the graph, at 25 years, the height is around 50 feet.
5. Extending the line of best fit, at 60 years, it might be around 80 feet.

Answer:

1. Scatter - plot with a line of best fit
2. Hours studied
3. Line of best fit
4. Yes, positive relationship (more hours studied, higher grade)
5. 90

For the pine - tree graph:

1. Scatter - plot with a line of best fit
2. Height (feet)
3. Growth of a pine tree over 50 years
4. 50 feet
5. 80 feet