Mathematics for IGCSE & O level - Sketching Curves (Section 1 - No. 42)

Which of the following is a key step in sketching a graph of a function?

Finding where the graph crosses the y-axis.

Finding the y-intercept only.

Ignoring the shape of the graph.

Using only algebraic methods.

Finding where the graph crosses the y-axis (x=0) is essential for sketching.