Curved Graphs

IGCSE 0580

Topic: Algebra and graphs

Core: C2.10 C2.11

Construct tables of values, and draw, recognise and interpret graphs for functions of the following
forms:
• ax^n (includes sums of no more than three of these)
• ab^x + c
Solve associated equations graphically, including finding and interpreting roots by graphical methods.
Recognise, sketch and interpret graphs of the following functions:
(a) linear
(b) quadratic

Extended: E2.10, E2.11, E2.12, E.13

Everything in Core.
Draw and interpret graphs representing exponential growth and decay problems.
Recognise, sketch and interpret graphs of the following functions:
(a) linear, (b) quadratic, (c) cubic, (d) reciprocal, (e) exponential.
Estimate gradients of curves by drawing tangents.
Use the derivatives of functions of the form ax^n, where a is a rational constant and n is a positive
integer or zero, and simple sums of not more than three of these.
Apply differentiation to gradients and stationary points (turning points).
Discriminate between maxima and minima by any method.
Understand functions, domain and range and use function notation.
Understand and find inverse functions.
Form composite functions as defined by gf(x) = g(f(x)).

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Basic Shapes of Graphs

A quick overview on the types of curved graphs we'll be looking at in this series and how to see the difference between them.

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Drawing a parabola

How to draw a parabola when given a quadratic equation.

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Drawing a negative parabola

How to draw a parabola when given a quadratic equation. This is an unhappy parabola 🙁

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Equation from a graph

How to get the equation from a sketch on a Cartesian plane.

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Points from an equation

How to get the points on a graph from an equation.

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Parabola with only one x-intercept

If you only get one answer for a quadratic equation the parabola is only touching the x-axis and not crossing it.

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Curve and Line intersection

Make sure you know how to work out the coordinates where a curve and line cross each other.

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Curve and Line intersection

Make sure you know how to work out the coordinates where a curve and line cross each other. Two exam examples for you 🙂

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Find gradient with a tangent line

Finding the gradient graphically with a tangent line.

Extended only

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Find gradient with derivative

How to calculate the gradient of a function at any point using the derivative.

Extended only

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Find turning points with derivative

How to find the turning points of a function using the derivative.

Extended only

Worksheet

Here are some questions that you can try on your own.