Slope Intercept on Scatter Plot

a measure of the steepness of a line on a graph; the rise divided by the run

• Trend line

• Scatter plot

• Slope

• y intercept

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20

• y = -x + 19

• y = x + 20

• y = 2/3x + 15

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

• A

• B

• C

• D

Suppose data related to the AVERAGE Temperature outside (T) and the number of winter Coats (C) sold at a store is collected and graphed.

The LINE OF BEST FIT has the equation C = -3T + 150.

Use this equation to predict the number of coats sold when the average temperature outside is 20°.

• 40

• 75

• 90

• 115

The linear regression equation for the data is  y = 1.5x + 12.  Interpret the slope of the equation.

• The slope is (0, 1.5).  It means that a pizza with 0 toppings will cost $1.50.

• The slope is 1.5.  It means that it costs $1.50 per topping.

• There are 1.5 toppings.

• There are 1.5 pizzas.

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.

What is a reasonable slope for this graph?

• -5

• -2

• 10

• 5

The Y-INTERCEPT of this line is . . .? (hint: find the equation in point-slope form first and then put it into slope-intercept form)

• 11

• 4

• 9

• 20

Suppose a LINE OF BEST FIT passes through the points (6, 34) and (8, 50). The EQUATION of this line is . . .? (hint: find the slope and the equation in point-slope form. THEN put it into slope-intercept form)

• y = 8x – 5

• y = 2x

• y = 2x + 7

• y = 8x – 14

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No