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Using Equations to Represent Trend Lines Answers

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What is the slope of the line of best-fit in the scatterplot below?

Question illustration
A
StartFraction 9 Over 27 EndFraction
Option A
B
StartFraction 3 Over 7 EndFraction
Option B
C
StartFraction 7 Over 3 EndFraction
Option C
D
StartFraction 27 Over 9 EndFraction
Option D
2
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A basketball coach plotted data about her shooting guard’s playing time and point scoring in a scatterplot. Shooting Guard Minutes Played and Points Scored Which is the equation of the line of best-fit?

Question illustration
A
y = StartFraction 15 Over 22 EndFraction x + StartFraction 6 Over 11 EndFraction
Option A
B
y = StartFraction 15 Over 22 EndFraction x + StartFraction 43 Over 11 EndFraction
Option B
C
y = StartFraction 22 Over 15 EndFraction x minus StartFraction 86 Over 15 EndFraction
Option C
D
y = StartFraction 22 Over 15 EndFraction x minus four-fifths
Option D
3

Which equation of a line of best-fit reflects a negative correlation?

A
y = StartFraction 1 Over 70 EndFraction x + 312
Option A
B
y = StartFraction negative 83 Over negative 27 EndFraction x + 15
Option B
C
y = 8 x minus 2
Option C
D
y = negative 6 x + 13
Option D
4

Loren solved the equation for b as part of her work to find the equation of a trend line that passes through the points (1, 130) and (10, 149). What error did Loren make?

Question illustration
A
She should have solved for b.
Option A
B
She should have solved for b.
Option B
C
She should have solved for b.
Option C
D
She should have solved for b.
Option D
5

Miguel is calculating the slope of a line of best-fit in the scatterplot below. Which pair of points would be best for Miguel to use?

Question illustration
A
P and W
B
Q and V
C
R and U
D
S and T
6

Which expression can be simplified to find the slope of the trend line in the scatterplot?

Question illustration
A
StartFraction 24 minus 79 Over 12 minus 2 EndFraction
Option A
B
StartFraction 24 + 79 Over 12 + 2 EndFraction
Option B
C
StartFraction 24 minus 79 Over 2 minus 12 EndFraction
Option C
D
StartFraction 24 minus 79 Over 12 + 2 EndFraction
Option D
7

Which is the equation of a trend line that passes through the points (7, 450) and (14, 401)?

A
y = negative 7 x + 499
Option A
B
y = negative StartFraction 1 Over 7 EndFraction x + 451
Option B
C
y = StartFraction 1 Over 7 EndFraction x + 449
Option C
D
y = 7 x + 401
Option D
8

Jeremy surveyed students in his class about their spending habits in the school cafeteria. He used the data to create a scatterplot.How Students Spend Money in the Cafeteria Which is the equation of his trend line?

Question illustration
A
y = 2.75 x
Option A
B
y = 3.05 x minus 0.6
Option B
C
y = 3.25 x minus 1
Option C
D
y = 9.75 x minus 14
Option D
9

What is the slope of a trend line that passes through the points (5, 80) and (7, 65)?

A
Negative StartFraction 15 Over 2 EndFraction
Option A
B
Negative StartFraction 2 Over 15 EndFraction
Option B
C
StartFraction 2 Over 15 EndFraction
Option C
D
StartFraction 15 Over 2 EndFraction
Option D
10

Which expression can be simplified to find the slope of the trend line in the scatterplot?

Question illustration
A
StartFraction 21 minus 35 Over 8 minus 4 EndFraction
Option A
B
StartFraction 8 minus 4 Over 21 minus 35 EndFraction
Option B
C
StartFraction 35 minus 21 Over 8 minus 4 EndFraction
Option C
D
StartFraction 8 minus 4 Over 35 minus 21 EndFraction
Option D

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