## Mark all of the statements that are true. (will attach graph shortly) a. The range for this function is the set {3}. b. This graph is not a function because the value of y is the same for every value of x. c. The domain for this function is all real numbers. d. The domain for this function is the set {3}. e. All real numbers are in the range of this function. ***CHOOSE ALL THAT APPLY!! And please explain!! :)

October 13, 2019// Blog//

**Answer:**

Hence, the correlation coefficient is:

** r=1.0**

**Step-by-step explanation:**

We know that the correlation coefficient ”r” is calculated by the formula:

Let x denote the data point (Number of days since purchase)

Let y denote the data point (Mileage Displayed on odometer)

x y X=x-x’ Y=y-y’ XY X² Y²

15 67 -20 -95 1900 400 9025

25 122 -10 -40 400 100 1600

35 164 0 2 0 0 4

45 210 10 48 480 100 2304

55 247 20 85 1700 400 7225

x’ be the mean of the data of the x-values.

Also let y’ denote the mean of the y-values.

Now we have:

∑ XY=4480

∑ X²=1000

∑ Y²=20158

**Hence, we put all the values in the formula (1) to obtain:**

**r=0.997 which is close to 1.0**

Also from the scatter plot we could observe that the relationship is linear and also strong positive relationship.

**Hence, the correlation coefficient is 1.0**