# Scatterplots for you!

## Quiz by Tom Evanosky

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15 questions
• Q1
The correlation seen in the graph at the right would be best described as:
no correlation
what's a correlation
negative correlation
positive correlation
30s
• Q2
The correlation seen in the graph at the right would be best described as:
negative correlation
positive correlation
no correlation
30s
• Q3
The correlation seen in the graph at the right would be best described as:
negative correlation
positive correlation
no correlation
30s
• Q4
You are going to write an equation of a line for the scatter plot shown. What should you do first?
find slope using (3, 4) & (4, 6)
find slope using (1, 1) &(7, 8)
connect the dots
decide which two points give the most representative straight line
30s
• Q5
TRUE or FALSE: When data is graphed and a positive correlation is observed, the FIRST set of data is always causing the affect seen in the second set of data.
TRUE
FALSE
30s
• Q6
The scatter plot shows the temperature in relation to the number of visitors at the beach. If you predict the number of people that would show up at the beach to be 700, you would be:
extrapolating
interpolating
30s
• Q7
When making a scatter plot you should never
plot more than one y value for any x value
label the axes
use graphing software
connect the dots
30s
• Q8
If you were asked to interpolate information from this graph, you would have to be careful to limit the temperature range to:
between 82 and 96 degrees.
temperatures 86 and 94 only
between 84 and 94 degrees
there is no limit when interpolating data
30s
• Q9
Another term for line of best fit is:
trend line
slope
scatter plot
tangent line
30s
• Q10
Prepare a scatter plot for the following data. Determine from your graph whether there is a correlation between the number of hours spent in the mall and the number of dollars spent.
Positive
None
Negative
30s
• Q11
The following chart shows the prices of gasoline and milk at a local convenience store for a period of three weeks. Examine this data for correlation between the price of gasoline and milk. What do you think the correlation is between these two?
No, negative
No, positive
Yes, positive
Yes, negative
30s
• Q12
Which situation describes a situation that is NOT a casual relationship?
The rooster crows as the sun rises.
The faster the pace of the runner the quicker the runner finishes.
The more powerful the microwave the faster the food cooks.
The more miles driven, the more gas needed.
30s
• Q13
What can be said about a student's study habits based on their grade point average?
Low GPA comes from too much snacking
I'm the dot in the lower left corner
Higher grade point average involves more hours studying
Those students on the right need to get out more.
30s
• Q14
Which scatter plot best represents the data pairs: (10,2); (40, 10); (15, 5); (5, 3); (55, 9); (30, 8); (25, 6)
C
D
A
B
30s
• Q15
Given in the table and scatter plot are the number of negative consumer reviews and the number of smartphones sold. Pick two points from the line of best fit and determine the equation for the line of best fit.
y = -8x + 1000
y = -1150x + 8
y = -8x + 1150
y = 8x + 1150
30s

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