The values of x when y = -1 are approximately

Mathematics

WAEC 1998

A. -10 and 2.0
B. -1.3 and 2.3
C. -0.6 and 2.6
D. -0.6 and 1.6
E. 1.6 and 1.6

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Correct Answer: Option D

Explanation

Draw a straight line from y = -1 to meet the curve on both sides. From the point where the straight line touches the curve, draw a line from there to meet the x-axis, then read off the values.

So when y = -1, x = - 0.6 or 1.6

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The values of x when y = -1 are approximately

Correct Answer: Option D

Explanation

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