4.5 Practice

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

Determine the predicted income if 22 hours were worked on an assembly job.

• $207.30

• $449.60

• $691.90

• $543.30

What type of association does this graph show?

• Positive
• negative
• none
• all of the above

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

• Yes

• No

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

• Yes

• No

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D

The table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.

• f(x) = 25.05x + 5.57

• f(x) = 127x + 25.05

• f(x) = -127x + 25.05

• f(x) = 127x - 25.05

Find the line of best fit

• y = 6.3x + 62

• y = 62x + 6.3

• y = 3x + 84

• y = 84x + 3

Find the line of best fit

• y = 0.42x - 20

• y = -20x + 0.42

• y = 67x + 8.5

• y = 8.5x + 67

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55
• 0
• 103
• 100