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WAEC 2021 · Paper 1 · Q48

The equation of a line is 3x−5y=73x - 5y = 7. Find its gradient.

Worked solution (try it first)
  1. Make yy the subject: subtract 3x3x from both sides to get −5y=−3x+7-5y = -3x + 7.
  2. Divide every term by −5-5: y=35x−75y = \frac35x - \frac75.
  3. The gradient is the coefficient of xx: 35\frac35, option B.

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