Vocabulary
Associations 101
Writing Equations
Predicting Data
Context Clues
100
A graph with points to show the relationship between two sets of data
Scatter plot
100
What kind of association is shown?
Positive linear
100
What is the slope-intercept form used for writing equations of lines of best fit?
y=mx+b
100
What is the exact value of y when x = 0.5
y = 140 cups
100
What are the variables?
Average resting heart rate (bpm) and weekly exercise (hours)
200
A type of association where when one variable increases, the other increases
positive (linear) association
200
What kind of association is shown?
Nonlinear
200
Write an equation for the line:
y=(1/4)x+2
200
What is the estimated tip for a bill of $20?
Tip is estimated $4
200
What does the slope mean in the context?
The sports team is drinking 30 cups of sports drink per hour
300
A data point that is very different from the rest of the data
outlier
300
What kind of association is shown?
Negative linear!
300
What is the slope of the linear model?
m=10/6=5/3
300
What is the estimated bill for a tip of $8?
Bill is estimated $40
300
What does the y-intercept mean in this situation?
A server makes $0 on a $0 bill.
400
A line on a scatter plot that helps show the correlation between data sets more clearly
line of best fit
400
What type of association is shown?
Positive linear
400
What is the equation of the line of best fit?
y=-30x+150
400
Use the line of best fit below to estimate for y when x = 10.
y=2x-5
y=2(10)-5=20-5=15
y=15
400
Describe the relationship between the variables:
The more class time that is spent on hands-on projects, the more students enjoy science class.
500
A type of association where when one variable increases, the other descreases
Negative (linear) association
500
Would this be a positive association or negative
Positive!
500
What is the equations for the line of best fit?
y=(1/5)x
500
Use the line of best fit below to estimate for x when y = 100.
y=(1/2)x+20
100=(1/2)x+20
80=(1/2)x
x=160
500
What is the slope telling you about the variables? Need the slope to get this answer.
The slope is 2/3. This means that for every 3 years of experience, a veterinary tech will make $2 more dollars an hour. (OR 66 cents more per year of experience.)