1.
Determine two points that appear to represent the data in the scatter plot. Then find and interpret the slope.
A.
Mary improved her free throw performance from year-to-year by an average of about 20%
B.
Mary improved her free throw performance from year-to-year by an average of about 25%.
C.
Mary improved her free throw performance from year-to-year by an average of about 15%
D.
Mary improved her free throw performance from year-to-year by an average of about 10%.
Hint
2.
Which is the best prediction equation for the data?
A.
y
= 10
x
- 19,950
B.
y
= 20
x
- 19,950
C.
y
= 5
x
- 19,950
D.
y
= 25
x
- 19,950
Hint
3.
Use a graphing calculator to find the equation of the regression line.
A.
y
= 23
x
- 21,000
B.
y
=
x
- 576
C.
y
= 12
x
- 23,947
D.
y
= 2
x
- 25
Hint
4.
Use two ordered pairs to write the equation of a best-fit line.
A.
y
= 3
x
B.
y
= 5
x
+ 75
C.
y
= 3
x
+ 72
D.
y
= 5
x
Hint
5.
Ilene analyzed her test scores and determined the equation of the best-fit line was
y
= 4.25
x
+ 72. Predict her score for the 5th test.
A.
98.5
B.
88.75
C.
93.25
D.
72.5
Hint