Understand the gradients of perpendicular straightline graphs
The general equation for a straight line graph is given by
y = mx + c
Where m is the gradient of the line, and c is the yintercept.
To understand the gradients of perpendicular straight line graphs you must always remember to find the the slope (gradient) and y intercept.
Suppose we have two equations:
y = m^{1}x^{ }+ c^{1}y = m^{2}x + c^{2}
If m^{1} and m^{2} multiplied together make 1, the two lines are perpendicular, regardless of the rest of the equation.
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