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# Coordinate Geometry and Graphs

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### Whose Line Graph Is it Anyway?Live

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Age 14 to 18

Challenge Level

The illustration shows the graphs of fifteen functions. Two of them have equations y=x^2 and y=-(x-4)^2. Find the equations of all the other graphs.

Age 16 to 18

Challenge Level

This is a beautiful result involving a parabola and parallels.

Age 14 to 18

Challenge Level

Change one equation in this pair of simultaneous equations very slightly and there is a big change in the solution. Why?

Age 16 to 18

Challenge Level

Can you work out the equations of the trig graphs I used to make my pattern?

Age 16 to 18

Challenge Level

Which curve is which, and how would you plan a route to pass between them?

Age 16 to 18

Challenge Level

Can you find a quadratic equation which passes close to these points?

Age 16 to 18

Challenge Level

Which line graph, equations and physical processes go together?