Vocab
Correlations
How to
Example problems
Random
100
What does CROC stand for?
Constant Rate of Change
100
Draw a scatter plot that shows positive correlation.
Graph showing scatterplot moving in an upward direction.
100
How do you find the slope?
You take two points and follow the slope formula:
y - y
____
x - x
100
What is the slope of this equation? y=5x+45
5
100
How do you tell if the Line of Best Fit is correct for the graph?
It has the same amounts of points above and below the line.
200
What is an outlier?
A data point that does not fit the rest of the data.
200
Draw a scatter plot that shows a negative correlation.
Graph shows a scatter plot moving in a downward direction.
200
How do you find the slope in slope-intercept form?
It's the M in
y=mx+b
200
What is the slope of this graph?
2
200
What variable goes on the x-axis?
The independent variable.
300
What is rate of change?
The ratio of the change in one quantity to the change in another quantity
300
What is a positive correlation?
two data sets have a positive correlation when their data values increase or decrease together
300
How do you make predictions using the line of best fit?
You take an x or y value and substitute it into the equation to find the answer.
300
What is the line of best fit for this scatter plot?
y=x
300
What variable is impacted by the other variable and is placed on the y-axis?
The dependent variable.
400
What is a scatter plot?
a graph with points plotted to show a possible relationship between two sets of data
400
What is a negative correlation?
two data sets have a negative correlation if one set of data values increases while the other decreases
400
How do you find the line of best fit?
Answers vary.
400
Graph this table
x y
1 3
2 5
3 4
4 7
400
What is a linear function?
Any function that graphs a straight line.
500
A line that describes the trend of the data in a scatter plot.
The line of best fit.
500
What is no correlation?
two data sets have no correlation when there is no relationship between their data values
500
How do you write an equation for the line of best fit from a scatterplot?
You take two points and use the equation
(y2-y1)/(x2-x1) to find the slope, then you substitute the slope in y=mx+b to find the y-intercept.
500
find the line of best fit for this graph.
y=x+2
500
What is the equation for point-slope form?
y - y1 = m(x - x1)