# scatter plots and linear equations

## Quiz by Jennifer Blaha

Mathematics
Ohio Learning Standards

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13 questions
• Q1

Which of the following statements about the graph is true?

The graph shows no trend.

The graph shows a negative trend.

The graph shows a constant trend

The graph shows a positive trend.

120s
• Q2

Which of the equations below best represents the line with the following points?

= --10

+ 10

x -10

= -+10

120s
• Q3

Does the data set have a positive, a negative, or no correlation?

The number of hours a plane is in flight and the number of miles flown.

no correlation

negative correlation

constant correlation

positive correlation

120s
• Q4

Does the data set have a positive, a negative, or no correlation?

The number of hours in flight and the gallons of fuel remaining

positive correlation

no correlation

negative correlation

120s
• Q5

What is the equation of the line of best fit on the scatter plot below?

y = 5x+5

y = x+25

y = x+5

y = 5x+25

120s
• Q6

What is the slope of the line that goes through points (3, 4) and (5, 2)?

Users enter free text
120s
• Q7

What is the slope of the line that goes through points (-2, -1) and (4, 3)?

2

3/2

1

2/3

120s
• Q8

What is the approximate slope of the best fit line below?

7/5

5/7

-7/5

-5/7

120s
• Q9

On the scatter plot shown, what is the equation of the line of best fit?

25x + 170

-25x + 170

-5/8x + 170

5/8x + 170

120s
• Q10

The scatter plot below shows the numbers of customers in a restaurant for four hours of the dinner service on two different Saturday nights.  The line shown models this relationship,

and x = 0 represents 7:00 p.m.

Which equation matches the best fit line below?

y = -x + 50

y = -5x + 50

y = 10x + 50

y = -10x + 50

120s
• Q11

The scatter plot below shows the numbers of customers in a restaurant for four hours of the dinner service on two different Saturday nights.  The line shown models this relationship,

and = 0 represents 7:00 p.m.

What is the meaning of the y-intercept?

The number of customers in the restaurant at the end of the night.

The number of customers in the restaurant at opening time, 7:00 p.m.

The number of hours customers were in the restaurant at opening time, 7:00 p.m.

The opening time of the restaurant.

120s
• Q12

The scatter plot below shows the numbers of customers in a restaurant for four hours of the dinner service on two different Saturday nights.  The line shown models this relationship,

and = 0 represents 7:00 p.m.

What does the slope of the best fit line below represent?

speed of servers

number of hours open

hours per customer

customers per hour

120s
• Q13

What is the slope of the equation 3y = -9x + 12?

Users enter free text