Quiz about Scatter Plots and Trend Lines

Question 1

Match the scatter plot to the equation that could represent the equation of its trend line.

Accepted Answer

y = -x + 5

Answer

y = 3x

Answer

y=4x-2

Answer

y = -5x

Answer

The relationship is not linear

Question 2

Match the scatter plot to the equation that could represent the equation of its trend line.

Accepted Answer

The relationship is not linear

Answer

y = 3x

Answer

y=4x-2

Answer

y = -x + 5

Answer

y = -5x

Question 3

Match the scatter plot to the equation that could represent the equation of its trend line.

Accepted Answer

y = 3x

Answer

y=4x-2

Answer

y = -x + 5

Answer

y = -5x

Answer

The relationship is not linear

Question 4

Match the scatter plot to the equation that could represent the equation of its trend line.

Accepted Answer

y = x + 3

Answer

y = 3x

Answer

y = -x + 5

Answer

y = -5x

Answer

The relationship is not linear

Question 5

Write the equation of the trend line in slope-intercept form.

Accepted Answer

$$y=-\frac{1}{2}x+6$$

Answer

$$y=\frac{1}{2}x-6$$

Answer

$$y=6x+\frac{1}{2}$$

Answer

$$y=-6x+\frac{1}{2}$$

Question 6

Write an equation of the trend line in slope-intercept form.

Accepted Answer

$$y=25x+150$$

Answer

$$y\ =\ 2x-155$$

Answer

$$y=\ 150x+200$$

Answer

$$y=30x+150$$

Question 7

Write an equation of the trend line in slope-intercept form.

Accepted Answer

$$y=25x$$

Answer

$$y\ =\ 10x$$

Answer

$$y=3x+250$$

Answer

$$y=50x$$

Question 8

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

The equation of the trend line is y = 2500x-125

Accepted Answer

False

Answer

True

Question 9

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

The group of hikers descends about 250 feet every minute.

Hint: What's the unit rate, slope?

Accepted Answer

False

Answer

True

Question 10

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

The hikers began at an elevation of 2,500 feet.

Accepted Answer

True

Answer

False

Question 11

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

As time increases, the elevation increases.

Accepted Answer

False

Answer

True

Question 12

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

The graph shows a negative association.

Accepted Answer

True

Answer

False

Question 13

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

There are several outliers in the scatter plot.

Accepted Answer

False

Answer

True

Question 14

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

The scatter plot is demonstrating a linear relationship.

Accepted Answer

True

Answer

False

Question 15

What is another term for trend line?

Accepted Answer

Line of Best Fit

Answer

Straight line

Answer

Linear

Question 16

How do I determine the slope of the trend line from a graph?

Accepted Answer

$$\frac{Rise\ }{Run}$$

Answer

look where the line crosses the y-axis

Answer

use the slope formula

Question 17

How do I determine the y-intercept of the trend line from a graph?

Accepted Answer

look where the line crosses the y-axis

Answer

$$\frac{Rise\ }{Run}$$

Answer

use the slope formula

Question 18

What is the slope - intercept form?

Accepted Answer

y = mx + b

Answer

$$\frac{y_2-y_1}{x_2-x_1}$$

Question 19

What is the slope formula?

Accepted Answer

$$\frac{y_2-y_1}{x_2-x_1}$$

Answer

y = mx + b

Scatter Plots and Trend Lines

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