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x 6.20 6.85 7.50 y 3.90 5.20 6.50 The points on a linear graph are as...

Mathematics
WAEC 2020
x 6.20 6.85 7.50
y 3.90 5.20 6.50

The points on a linear graph are as shown in the table. Find the gradient (slope) of the line. 

  • A. 2\(\frac{1}{2}\)
  • B. 2
  • C. 1
  • D. \(\frac{1}{2}\)
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Correct Answer: Option B
Explanation

Gradient = \(\frac{y_2 - y_ 1}{x_2 - x_1}\)

= \(\frac{5.20 - 3.90}{6.85 - 6.20}\)

= \(\frac{1.3}{0.5}\) 

= 2

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts