Vocab
Relationships/Correlations
Lines of Fit
Interpreting Lines of Fit
100
A graph that shows a relationship between two things using dots is a ...
Scatter plot
100
Which relationship is modeled by the scatter plot
Negative Linear Relationship
100
What form must lines of fit must be written in?
Slope-intercept form or y=mx +b
100
How do you identify the y intercept
y=mx+b
the constant value in the equation y=mx+b
slope is b
200
An empty space between points in a scatter plot
Gap
200
Name all four types of scatter plot relationships
Positive Linear, Negative Linear, Nonlinear, and No Relationship
200
Is the line a good line of fit for the data?
No, there are too many points below the line of fit.
200
What two things do we interpret in a line of fit?
slope and y-intercept
300
A close grouping of points on a scatter plot
Cluster
300
Which scatter plot relationship is this...
As the supply of toilet paper decreases, the demand increases
Negative linear
300
Why is this a good line of fit?
It passes through most points, shows a trend, linear, etc
300
Interpret means...
to explain the meaning of something
400
A data point that does not follow the pattern or trend
Outlier
400
Which relationship is modeled by the sentence...
"Quarters played in a basketball game vs. total points scored."
Positive Linear
400
Why do we use lines of fit?
To make predictions
400
The number of questions answered, y, and the time (x in minutes) given for a test is modeled by the equation
y=2x
Interpret the slope
The person answers 2 questions per minute.
500
Define a line of fit
A linear line that shows where points are trending. It passes through most points.
500
Which scatter plot relationship is this...
The velocity of a jet taking off and the time it takes to leave the ground.
Nonlinear
500
What is the criteria to make a good line of fit (4 things)
1. Must be linear
2. Passes through most of the points
3. Is centered amongst the data
4. Must be in slope intercept form
500
Interpret the y-intercept of the scatter plot
At zero seconds, the position is zero.