If \(y = 4x - 1\), list the range of the domain \({-2 \leq x
FURTHER MATHEMATICS
WAEC 2016
If \(y = 4x - 1\), list the range of the domain \({-2 \leq x \leq 2}\), where x is an integer.
- A. {-9, -1, 2,3, 4}
- B. {-9, -2, 0, 1, 7}
- C. {-5, -4, -3, -2}
- D. {-9, -5, -1, 3, 7}
Correct Answer: D. {-9, -5, -1, 3, 7}
Explanation
The elements of x are {-2, -1, 0, 1, 2}
\(y = 4x - 1\) = 4(-2) - 1 = -9; 4(-1) - 1 = -5; 4(0) - 1 = -1; 4(1) - 1 = 3; 4(2) - 1 = 7.
The range of x is {-9, -5, -1, 3 7}.
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