Answer:
A. R2 = 0.6724, meaning 67.24% of the total variation in test scores can be explained by the least‑squares regression line.
Step-by-step explanation:
John is predicting test scores of students on the basis of their home work averages and he get the following regression equation
y=0.2 x +82.
Here, dependent variable y is the test scores and independent variable x is home averages because test scores are predicted on the basis of home work averages.
The coefficient of determination R² indicates the explained variability of dependent variable due to its linear relationship with independent variable.
We are given that correlation coefficient r= 0.82.
coefficient of determination R²=0.82²=0.6724 or 67.24%.
Thus, we can say that 67.24% of total variability in test scores is explained by its linear relationship with homework averages.
Also, we can say that, R2 = 0.6724, meaning 67.24% of the total variation in test scores can be explained by the least‑squares regression line.
We have been given that Jin cut a round gelatin dessert into 8 equal pieces. Seven of the pieces were eaten. We are asked to find the angle measure of the dessert that was left.
We know that there are 360 degrees degrees in a circle all the way around the center.
Since Jin cut all pieces of same size, so angle measure of all pieces will be equal.
To find the angle measure of each piece, we will divide 360 by 8.
Therefore, the angle measure of the dessert left dessert piece is 45 degrees and option D is the correct choice.
Hey! here is the answer
<u>b³+c
</u>b²c²
Answer:3/2
Step-by-step explanation:
3/2
