

1. 
What type of relationship or pattern does the scatter plot suggest? 





A. 
no pattern 
B. 
a linear relationship whose data have a negative relationship 


C. 
a linear relationship whose data have a positive relationship 
D. 
none of these 


Hint 


2. 
Which is the best prediction equation for the data? 





A. 
y = 10x  19,950 
B. 
y = 5x  19,950 


C. 
y = 25x  19,950 
D. 
y = 20x  19,950 


Hint 


3. 
The math scores, x, and chemistry scores, y, for six students are given in the table. Use a graphing calculator to find the Pearson productmoment correlation. 





A. 
about 0.68 
B. 
about 0.71 


C. 
about 0.74 
D. 
about 0.65 


Hint 


4. 
Use two ordered pairs to write the equation of a bestfit line. 





A. 
y = 5x + 75 
B. 
y = 3x + 72 


C. 
y = 5x 
D. 
y = 3x 


Hint 


5. 
Determine two points that appear to represent the data in the scatter plot. Then find and interpret the slope. 





A. 
Paul's test scores improve an average of 5 points with each test. 


B. 
Paul's test scores improve an average of 3 points with each test. 


C. 
Paul's test scores are neither increasing nor decreasing. 


D. 
Paul's test scores improve an average of 15 points with each test. 


Hint 

