Question

Y X
5 45
4 56
5 54
6 56
7 57
6 58
6 67
6 68
7 76
7 76
8 78
9 79
12 80
13 81
15 84
17 89
a. Calculate the correlation between X and Y

b. Apply the regression between X and Y (as dependent variable)

c. Estimate the R square

d. Predict Y when X = 50

Answer 1

Answer:

When an object is placed between focus and pole of concave mirror, the image formed is virtual, magnified and erect. However, when an object is placed between centre of curvature and focus of concave mirror, the image formed is real, magnified and inverted.