Linear Models (Equations)
Misc. Review
Misc. Review Pt 2
100
Given the scatter plot and the equation, what does the slope mean in this context?
For each unit increase in _____, ______ increases/decreases by ______
For each unit increase in hours, the battery life remaining decreases by 0.75.
100
How do you calculate the slope of a line when given two points?
y2-y1/x2-x1
100
Given the line of best fit y = 2x + 4, find the estimated y-value whenx = 10
y= 24
200
Given the scatter plot and the linear equation, what type of association is shown?
Negative Association
200
How do you determine the PREDICTED value from a scatter plot?
Use the line of best fit
200
What is general slope-intercept form for a linear equation?
y = ___________
y = mx + b
300
Is the following the best fit, good fit, bad fit? Explain.
Best fit, line is through the middle of the data
300
How do you determine the ACTUAL value from a scatter plot?
The point
300
If both variables increase together, what kind of association will be shown on a scatterplot?
Positive association
400
Which graph shows the most accurate line of best fit?
A
400
What does the scatter plot look like when there is no association
Data points are all over the place
400
True or False: An outlier in a scatter plot are CLOSE BY all the other points.
False. The outlier is a data point that is far from the other points.
500
What is the y-intercept for the line of best fit?
1
500
A residual plot shows what about a linear model?
Whether a linear model is appropriate and the accuracy of the actual value to the estimated value. Smaller residuals indicate more accuracy
500
What TWO things does a linear equation tell you about a relationship?
The slope and y-intercept