x 6.20 6.85 7.50 y 3.90 5.20 6.50 The points on a linear graph are
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. \(\frac{1}{2}\)
Correct Answer: B. 2
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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