The table shows the examination marks of 8 students in Algebra and Statistics tests.
Algebra (x) |
10 |
24 |
30 |
35 |
48 |
59 |
68 |
70 |
Statistics (y) |
30 |
47 |
44 |
71 |
60 |
89 |
97 |
74 |
(a) Draw a scatter diagram for the data.
(b) Find x, the mean of x; and y, the mean of y and plot (x, y) on the graph.
(c) Draw a line of best fit to pass through (x, y).
(d) From your graph:
- find the equation of the line;
- estimate the statistics marks for a student who scored 50 in Algebra