What are increasing and decreasing functions?

How do I find where functions are increasing, decreasing or stationary?

• To identify the?intervals?on which a function is increasing or decreasing

What is a tangent?

• At any point on a curve (the graph of a (non-linear)?function), the?tangent?is the straight line that passes through that point and has the same?gradient?as the curve at that point

How do I find the equation of a tangent?

What is a normal?

• At any point on a curve (the graph of a (non-linear)?function),?the?normal?is the straight line that passes through that point and is?perpendicular?to the?tangent?at that point

How do I find the equation of a normal?

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