Equations of a scatter plot

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 does the slope mean in the context of the situation graphed?

• You burn 500 calories every 60 minutes of exercise.

• You eat 500 calories when you eat out 60 times.

• You burn 100 calories every 10 minutes of exercise.

• You should not exercise.

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x
• y = 30x
• y = 30x + 300
• y = (3/2)x + 300

Click on Image. Orange points are NOT necessarily data from the set.

• y = 1/4 x + 5

• y = 1/8 x + 5

• y = 8x - 5

• y = -1/4 x + 5

Click on Image. Blue points are NOT necessarily data from the set.

• y = -3/4 x + 9

• y = 3/4 x + 9

• y = -4/3 + 9

• y = -3/4 x - 9

Which equation written in slope-intercept form represents the trend line shown on the scatter plot below?

What is the equation of the line of best fit

• y= -2x + 10

• y= 10x+ 2

• y=2x+10

• y= 10

What is the equation of the line of best fit? Read the units carefully on this one!

• y = 750 x + 9500

• y = - 750 x +11000

• y = (3/4) x + 11

• y = - (3/4) x + 11000

The graph above shows a line of best fit for data collected on the amount earned by waiters and waitresses last week in relation to the number of tables they served.  What is the equation of the line of best fit?

• y = (5/3) x + 375

• y = (1/3) x + 475

• y = (5/3) x + 475

• y = (1/3) x + 375

What is the equation of the line of best fit?

• y= 2x+3

• y=3x+2

• y= $\frac{1}{2}x\ +3$

• y= $-\frac{1}{2}x\ +3$