Slope from Line of Fit

Find the slope from the table:

• -2/5

• 5/-2

• 5/2

• 2/5

The scatterplot shows data collected from 9 people about how much money they earned based on the hours they worked. Use 2 points on the line of best fit and find the slope.

Using your slope from the previous question, give the equation for the line of best fit in point-slope form (choose 1 of the 2 points you used to find the slope)

Oren plants a new vegetable garden each year for 14 years.  This scatter plot shows teh relationship between the number of seeds he plants and the number of plants that grow.  Which number best represents the slope of the line of best fit through the data?

• -10

• -1/10

• 1/10

• 10

• A

• B

• C

• D

the slope is -5/7, what does that mean?

• gain 5 hour of sleep for 7 cups of coffee

• lose 5 hours of sleep for 7 cups of coffee

• lose 7 cups of coffee for 5 hours of sleep

• lose 5 cups of coffee for 7 hours of sleep

A group of students did an experiment to see how drinking cups of coffee right before bed affected sleep.  The results are shown below in the scatter plot with a line of best fit.  Use the given line of best fit to approximate the rate of change relative to the scatter plot.

• (7/5) hours/cup

• (5/7) hours/cup

• - (7/5) hours/cup

• - (5/7) hours/cup

What is a reasonable slope for this graph?

• -5

• -2

• 10

• 5

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

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

• Yes

• No