2.2.3

Calculate Gradient &Y-intercept

Test yourself

Gradient and y-intercept of a Line

A straight line y = mx + c has gradient m and y-intercept c.

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y-intercept

  • The point where a line crosses the y-axis is called the y-intercept.
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Gradient

  • To calculate the gradient (slope) of a line, we choose 2 points on the line (xA, yA) and (xB, yB):
    • gradient = change in y ÷ change in x.
    • where change in y = (yA - yB) and change in x = (xA - xB).

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1Number

1.1Place Value

1.2Factors & Multiples

1.3Operations

1.4Fractions, Decimals & Percentages

1.5Growth & Decay

1.6Measurements & Units

1.7Accuracy

2Algebra

3Ratio, Proportion & Rates of Change

4Geometry & Measures

5Probability

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