What is the main purpose of Graphs?

What does \(x,y\) mean in Graphs?

Identify another important piece of notation used in Graphs.

Before doing a graphs calculation, what setup information should be written down?

State a central formula or test for Graphs.

How is the formula or method in Graphs interpreted rather than just memorised?

For V(x,y)=x^2+y^2, describe the surface and the level curve V=4.

For T(x,y)=10+x+2y, find the level curve where T=16.

What method choice is usually needed in a standard graphs question?

Use the notation of Graphs to explain what is being calculated or tested.

What does it mean when contour lines for pressure are close together?

What physical or modelling interpretation can Graphs have?

Correct this mistake in Graphs: thinking a contour is the graph height.

Why is it important to check assumptions when using Graphs?

Correct this second mistake in Graphs: comparing slopes without axis scales.

What units, dimensions, or variable-dependence check is useful in Graphs?

Correct this third mistake in Graphs: ignoring units on the output.

Design an exam solution plan for a multi-step graphs problem.

How could an incorrect setup affect a graphs result?

Give an exam-ready summary rule for Graphs.