Step 10 Objective
Plot the graphs of simple quadratic and cubic functions, e.g. y = x², y = 3x² and y = x³.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
How do you go about plotting the graph of a quadratic or cubic function?
When finding a set of coordinates, how do you decide the range of values
of x to use?
How do you check that the graph is correct?
Are these statements always, sometimes or never true?
If they are sometimes true, when precisely are they true and when are they
false?
- Quadratic graphs are symmetrical about the y-axis.
- Quadratic graphs are symmetrical about the x-axis.
- Quadratic graphs cross the x-axis twice.