Interpret Intercept Line of Best Fit

Data was collected on the weight of a male  laboratory rat for the first 25 weeks after its birth. The linear regression equation is 
y= 40x+100, where x is number of weeks and y is weight in grams. 
What does the y-intercept mean in context of the problem?

• The predicted weight of the rat in year 0. 

• The predicted weight of the rat at birth. 

• The current weight of the rat. 

• The average increase in the rat's weight. 

Tags

CCSS.HSF.LE.B.5

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.

Tags

CCSS.HSF.LE.B.5

The table shows the total numbers y of people who reported an earthquake x minutes after it ended.

Interpret the slope and y-intercept of the line of best fit.

slope = _____

Mathematical Equivalence

ON

Tags

CCSS.HSF.LE.B.5

The table shows the total numbers y of people who reported an earthquake x minutes after it ended. Interpret the slope and y-intercept of the line of best fit. y-intercept = ​ _____

Mathematical Equivalence

ON

Tags

CCSS.HSF.LE.B.5

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

Tags

CCSS.8.EE.B.5

MODELING REAL LIFE:

The table shows the grade point averages y of several students and the numbers x of hours they spend watching television each week.

c. Interpret the slope and y-intercept of the line of best fit.

slope = ​ (a)  

y-intercept = ​ (b)  

• -0.08

• 0.08

• 3.8

• -3.8

What is the initial value in a mathematical function?

• The slope of the line

• The highest value

• The y-intercept

• The x-intercept

Tags

CCSS.HSF-IF.C.7A

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

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

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

• Yes

• No

Tags

CCSS.8.EE.B.5