Answer:
0.57 or 0.6
Step-by-step explanation:
Attached is a screenshot of spreadsheet used to do this problem.
You will see the excel functions used for each column. The average score is highlighted in blue.
Sara drove 18 miles per gallon of gas.
72 miles ÷ 4 gallons of gas = 18 miles per gallon of gas
Vertical lines: lines that run up and down. If you are standing up then you are vertical. On a graph the x-axis has little marks that run up and down or "vertical." Since the x-axis has lines that run vertical then if you have a point use you x-ordinate (x number). Therefore; in the point (4, -3), your vertical line is x = 4.
In the point (2, 10), can you determine the vertical line ...
Which is x=2
For vertical line just take the other number and write y =.
Answer: -1
Step-by-step explanation:
Here is the complete question:
Brittany rents bicycles to tourists. She recorded the height (in cm) of each customer and the frame size (in cm) of the bicycle that customer rented. After plotting her results, Brittany noticed that the relationship between the two variables was fairly linear, so she used the data to calculate the following least squares regression equation for predicting bicycle frame size from the height of the customer: y'=1/3x + 1/3.
What is the residual of a customer with a height of 155 cm who rents a bike with a 51 cm frame?
The regression equation is given as:
y'=(1/3)x + (1/3)
Since the height is given as 155cm, x=155 cm
The predicted frame size,
y'=(1/3)x + (1/3)
y'=(1/3) × 155+ (1/3)
= 51 2/3 + 1/3
= 52
The observed frame size,
y=51
Residual = Observed y- predicted y
=51-52
= -1
The residual of a customer with a height of 155 cm who rents a bike with a 51 cm frame is -1.