Scatter Plots
What is the letter that we use for correlation coefficient?
r
Give equation of line of regression and correlation coefficient.
r=.565
y=.153x-1.193
How much does a cloud weigh?
Around 1 million pounds
Is there a positive or negative association between alcohol sales and deaths in the U.S.?
positive
y=15x+30
What will y be when x is 2?
y=60
What is the line called that goes through a scatter plot?
line of regression or line of best fit
Give correlation coefficient and equation of line of regression.
r= -0.892
y= -1.215x+24.07
What year was the first iPhone released?
2007
What would cause both hot cocoa sales and hat sales to increase? How can we measure that data?
y=10.5x+3.2
What is x when y is 4.5?
y=50.45
Direction
Give correlation coefficient and equation of line of best fit.
r=1
y=1x+0
Who painted Mona Lisa?
Leonardo de Vinci
What is one lurking variable between low homework scores and failed tests?
Number of absences, low attention span of student, poor teaching, low amount of help, student's desire to graduate, etc.
y=19x-64
What is y when x is 7?
y=69
Which variable is the response variable?
y
Estimate the correlation value of the graph shown.
-0.8 ish
What is the highest-grossing film of all time?
The Avatar
What is a lurking variable between age and IQ score?
Amount of schooling, grades while in school, learning opportunities available, background, etc.
Use the chart and predict what y is when x is 16.
y=7.47
Can we make a scatter plot comparing the amount of food thrown away and the number of times a day that you cuss?
Yes
Estimate the r value of the graph shown.
0.03 or 0
Who composed the music for the movie The Lion King?
Elton John
Come up with 2 CORRELATED variables that the lurking variable of mental health can affect.
TBD
Use the chart to predict y when x is 3.
y=2.4175