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WorksheetsMath Nation Algebra
Total questions: 20
Worksheet time: 20mins
Which of the following lines represents the line of best fit for the scatter plot?
A
B
C
D
The correlation coefficient is a number "r" such that:
-1<r<1
-1>r>1
-1≤r≤1
-1≥r≤1
What is the relative frequency of people that purchased no food?
10%
60%
15%
30%
What percentage of the days that it rained, did they forecast no rain?
About 20%
About 18%
About 14%
About 12%
What is the value of y in the solution to this system of equations? 3x - 5y = 22 y = -5x + 32
Graph the solution to the system. The first equation has been plotted for you.
Graph the following linear function: y=2x−4
Joley is opening her first checking account as a teenager. She doesn’t have a job, so most of the income will be gifts from birthdays and holidays. Bank A has an $8 monthly charge. Bank B charges 1% of the balance. Which account balance below will result in Bank A being a better financial choice?
$850
$550
$650
$750
Which scatter plot shows a negative relationship?
Graph A
Graph B
Graph C
Graph D
Which scatter plot show a positive relationship?
Graph A
Graph B
Graph C
Graph D
In the scatter plot, does the image shows a "Line of Best Fit"?
Yes
No
The equation of the trend line
is y= 1/2x +1. Use the equation to determine the amount of time it would take to bike 20 laps.
*Look at the x and y axis first before starting the problem
38 minutes
11 minutes
41 minutes
10 minutes
Based on the graph, if Joe earned $400, how many hours did he work?
20 hours
35 hours
45 hours
15 hours
Which equation do you use to calculate the residual?
predicted - actual
run / rise
actual- predicted
rise / run
Estimate the correlation coefficient for this scatterplot.
r = 1.2
r = 0.89
r = 0
r = -0.89
Estimate the correlation coefficient for this scatterplot.
r = -0.9
r = 1
r = 0.9
r = -1
Describe the relationship between the variables.
Strong positive correlation
Weak positive correlation
Strong negative correlation
Weak negative correlation
Estimate the correlation coefficient
r=-1
r=1
r=-0.5
r=0.5
Estimate the correlation coefficient.
r=-1
r=-0.5
r=1
r=0.5
Shown is a residual plot. Would a linear regression model of the data be most appropriate?
YES
NO
