1.
A scatter plot contains the points (2, 8) and (19, 59). Write an equation in slope-intercept form for the best-fit line of the scatter plot.
A.
B.
y
= -3
x
+ 15
C.
D.
y
= 3
x
+ 2
Hint
2.
Write an equation in slope-intercept form for the best-fit line of a scatter plot with points (7, 22) and (13, 25).
A.
y
= -2
x
+ 36
B.
y
= 0.5
x
+ 18.5
C.
y
= 2
x
+ 8
D.
y
= -0.5
x
+ 25.5
Hint
3.
Write an equation in slope-intercept form for the best-fit line of a scatter plot with points (12, 9) and (17, 2).
A.
y
= 1.4
x
– 7.8
B.
y
= -1.4
x
+ 25.8
C.
D.
Hint
4.
A best-fit line has an equation of
y
= 2.9
x
+ 1.7. Find
y
when
x
is 33.
A.
y
= 94
B.
y
= 97.4
C.
y
= 94.1
D.
y
= 90.7
Hint
5.
A best-fit line has the equation
y
= 13.7694
x
+ 3.99, which models the cost
y
of ordering
x
CDs from a music company. Predict the cost of ordering 8 CDs.
A.
about $110.16
B.
about $100.30
C.
about $114.15
D.
about $114.06
Hint