Starter quiz
- For the linear equation , you can call the __________ of the equation.
- gradient
- solution
- subject ✓
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- Which of the below are correct rearrangements of the formula ?
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- Make the subject of the equation
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- Make the subject of
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- Make the subject of
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- Make the subject of
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Exit quiz
- You can divide both sides of the formula by to make the __________.
- divisor
- equation
- subject ✓
- substitution
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- can be rearranged as and . Which arrangement is the most useful if you know time and speed and wish to calculate distance?
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- Which of these arrangements of the formula for area of a circle is most useful if you know the area and wish to find the radius?
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- Which rearrangement of the linear equation should you use if you know the coordinate and wish to find the coordinate?
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- What is the gradient of the straight line with the linear equation ?
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- The gradient of a straight line is and the -intercept is . Give the equation of the line in the form
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Worksheet
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Presentation
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Lesson Details
Key learning points
- Formulae are used in a variety of places, such as the science lab but also in factories.
- Rearranging the formula may be beneficial when what you wish to calculate is not the subject.
- You can compare rearranging the formula to solving for one unknown.
Common misconception
That the gradient of a line given the equation of the line is always just the coefficient of the x term.
Using graphing software to explore this could help.
Keywords
Subject of an equation/formula - The subject of an equation/a formula is a variable that is expressed in terms of other variables. It should have an exponent of 1 and a coefficient of 1.
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