TOPIC : REGRESSION
1. A line has equation 𝑦 = 0.5𝑥 + 2.
a. Pick five distinct x-values, use the equation to compute the corresponding yvalues, and plot the five points obtained.
b. Give the value of the slope of the line; give the value of the y-intercept.
2. The age x in months and vocabulary y were measured for six children, with the resultsÂ
shown in the table.
x | 13 | 14 | 15 | 16 | 16 | 18
y | 8 | 10 | 15 | 20 | 27 | 30
Compute the linear correlation coefficient for these sample data and interpret itsÂ
meaning in the context of the problem.
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