Linear Models

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

What is the equation of the line of best fit

• y= -2x + 10

• y= 10x+ 2

• y=2x+10

• y= 10

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points
• To make it look like you know what you are doing

Which graph has a correlation coefficient (r) of about -.6 ?

• a
• b
• c
• d

Evaluate the following function for x= 7

f(x)= x + 4

• f(7)= 8

• f(7)= 11

• f(7)= -11

• f(7)= 5

Evaluate the following function for x= 3

f(x)= 2x

• f(3)= 6

• f(3)= -2

• f(3)= 5

• f(3)= -7

Evaluate the following function for x= 2

f(x)= 2x + 4

• f(2)= 10

• f(2)= 2

• f(2)= 8

• f(2)= 4

Evaluate the following function for x= -2

f(x)= 5x + 1

• f(-2)= 10

• f(-2)= 8

• f(-2)= -9

• f(-2)= 2