Slope Intercept
Standard Form & Point Slope Form
Scatter Plots
Correlation and Causation
Linear Regression
100
What is the equation for Slope intercept form
y=mx+b
100
What is the equation for standard form
Ax + By = C
100
When the values of one data set increases and the other decreases, this is called a ___________ correlation.
negative
100
A positive correlation means that as x increases y_________.
Also increases
100
If our slope is negative.. our residual is _____.
negative
200
Determine the slope and y-intercept of the following equation. y = -x +3
m=-1 b=3
200
What is the equation for point slope form
y=m(x-x1)+y1
200
When the values for both data sets increase this is called a _______________ correlation.
positive
200
An r value of 0 means_________
No Correlation
200
Describe a correlation of -0.9 in terms of strength (weak, moderate, or strong) and direction.
Strong, negative.
300
y=-2x+3
300
Melody paddles her kayak at an average speed of 4 miles per hour. After 3 hours of canoeing, Melody has traveled 15 miles. Identify the equation in point-slope form to find the total distance y that Melody travels in x hours.
y-3=4(x-15)
300
Negative Correlation
300
what does the value of r tell us?
whether there is a linear correlation between two variables
300
Which linear regression equation is correlation used in?
Slope Intercept
400
The mathematics department sponsors Math Family Fun Night every year. In the first year, there were 35 participants. In the third year there were 57 participants.
y = 11x + 24
400
Use the following to write your equation in point slope form. m=-2; (-2, -3)
y=-2(x+2) - 3
400
nonlinear, negative trend
400
As temperatures rise... Crime rate rise.
Causation
400
A restaurant's menu items are compared in terms of correlation. Sugar versus Calories have a correlation of 0.25. Sugar versus Protein has a correlation of -0.68. Which has a stronger correlation?
Sugar versus Protein.
500
You are visiting Baltimore, MD. A taxi company charges a flat fee of $3.00 plus an additional $0.75 per mile. Write an equation that you could use to find the cost of a taxi ride in Baltimore, MD.
y=0.75x+3
500
Use the following to write your equation in point slope form. (3, 4) (4, 7)
y=3(x-3) + 4 or y=3(x-4) + 7
500
What is a line of best fit?
An average or line that hits the most points as possible
500
As the number of years a person works at their same job, the amount they get paid increases.
Correlation, it is likely to happen.
500
A student says, "There was a very strong correlation of 1.22 between Sugar and Fat content." Explain the mistake made here.
Correlation is between -1 and +1.