1.
What type of relationship or pattern does the scatter plot suggest?
A.
none of these
B.
no pattern
C.
a linear relationship whose data have a negative relationship
D.
a linear relationship whose data have a positive relationship
Hint
2.
Use a graphing calculator to find the equation of the regression line.
A.
y
= 2
x
- 25
B.
y
= 23
x
- 21,000
C.
y
= 12
x
- 23,947
D.
y
=
x
- 576
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 product-moment correlation.
A.
about 0.74
B.
about 0.65
C.
about 0.68
D.
about 0.71
Hint
4.
Graph the data on a scatter plot.
A.
B.
C.
D.
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 3 points with each test.
B.
Paul's test scores improve an average of 5 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