Interpret Lines of Best Fit

Interpret the slope of the line of best fit in the context.

• The number of hot chocolate cups sold decreases by 1.91278 with every degree increase.

• The number of hot chocolate cups sold increases by 1.91278 with every degree increase.

Connie sells hot chocolate at a stand in a park. She records the number of cups of hot chocolate she sells, as well as the average daily low temperature. Interpret the y-intercept.

• When the temperature is -0.895 degrees, Conne will sell 178 cups.

• When the temperature is 0 degrees, Connie will sell 176 cups of hot chocolate.

• When the temperature is 49 degrees, Connie will not sell any hot chocolate.

• The y-intercept cannot be interpreted from this data.

Connie sells hot chocolate at a stand in a park. She records the number of cups of hot chocolate she sells, as well as the average daily low temperature. Write the equation for the line of best fit using the values generated with technology.

Describe the strength of the association between temperature and the number of cups of hot chocolate Connie sells

• Weak

• Negative, strong

• Positive, strong

• Negative,moderate

• y = 1.45x + 22
• y = -2x + 15
• y = 1.33x + 30
• y = -1.5x + 24

A group of friends recorded the time it took to ride their bikes around the park.  This scatter plot shows their results with the line of best fit.  Which is closest to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7

The scatter plot below shows the number of books read by students in Mrs. Cates English class and their grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade.

• No relationship exists between the number of books students read and their English grades.

This line ​ (a)   fit the data. There are ​ (b)   points ​ (c)   the line.

• does not

• does

• too many

• above

• below

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

• Yes

• No

The graph shows a line of best fit for data collected on the amount of time teenagers spend on the computer and watching television.  Based on the line of best fit, how much time does a teenager spend watching television if they spend 2 hours on the computer?

• 150 minutes

• 135 minutes

• 165 minutes

• 180 minutes