Regression Equations and Slopes
1984
Answer the question.
6
Answer the question.
Negative
Determine what kind of correlation the points have.
None
Determine what kind of correlation the points have.
Positive
Determine what kind of correlation the points have.
-1
Find the slope of the line graphed.
2
Find the slope of the line graphed.
1/5
Find the slope of the line through the given points.
Undefined
Find the slope of the line through the given points.
0
Find the y-intercept of the line graphed.
1
Find the y-intercept of the line graphed.
6/5
Solve the equation 6w + 1 = -4w + 13
Linear Regression
The line that models the relationship between two variables in a data set by producing a line of best fit
Correlation Coefficient
The value between -1 and 1 which indicates how close the data are to the graph of the regression equation
Extrapolation
Using a linear regression line to make predictions outside of the data set.
Interpolation
Using a linear regression line to make predictions within the data set.
-.8
What is a reasonable r-value for the following graph?
.01
What is a reasonable r-value for the following graph?
.85
What is a reasonable r-value for the following graph?
y= -2x - 5
Write the equation of a line with slope -2 through (0,-5)
y = 3x + 1
Write the equation of a line with slope 3 through (0,1)
y = 3x - 1
Write the equation of the line with the given slope through the given point.
y= -2x + 5
Write the equation of the line with the given slope through the given point.
Slope
m = (y2 - y1) / (x2 - x1)
slope-intercept form
y=mx+b, where m is the slope and b is the y-intercept of the line.