The equation of the line of best fit for variables x and y is \(y...
FURTHER MATHEMATICS
WAEC 2006
The equation of the line of best fit for variables x and y is \(y = 19.33 + 0.42x\), where x is the independent variable. Estimate the value of y when x = 15.
- A. 18.91
- B. 19.75
- C. 25.63
- D. 38.23
Correct Answer: C. 25.63
Explanation
\(y = 19.33 + 0.42x\)
\(\text{The value of y when x = 15} = 19.33 + (0.42 \times 15)\)
= \(19.33 + 6.30\)
= 25.63
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