Term
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Definition
[image]
Where: m is the gradient
c is the y intercept |
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Term
| Calculating Gradient from an Equation |
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Definition
Straight lines have the form [image]
m is the gradient |
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Term
| Calculating y Intercept from an Equation |
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Definition
Straight lines have the form [image]
c is the gradient (it occurs at x=0) |
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Term
| Calculating the gradient of a line between Two Points |
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Definition
The equation of a line can be re-written as:
[image] |
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Term
| Equation of a Parallel Line |
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Definition
If the original line is [image] then the parallel line is [image]
Where:
d is the y intercept and has a different value to c in the original equation |
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Term
| Equation of a Perpendicular Line |
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Definition
Where the original equation is [image] the perpendicular is [image]
Where
c and d are y intercepts of their respective equations |
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Term
| Plotting an Equation of a Line |
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Definition
Create a table of x values containing at least three values.
Calculate the values for y at these x values
Plot the points on a correctly drawn set of axes.
If you have done your calculations correctly they will join into a line. |
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