Wednesday, 1 July 2015

Key Ideas of Today's Lesson

In the previous lesson, we learnt to describe the behaviour of the graph, in particular, where the graph cuts the y-axis (i.e. the y-intercept).

Building on the above, we investigated the behaviour of the graph when the value of "m" changes.
"m" is the gradient of the graph, i.e. how the graph 'slants' (how steep/ gentle, upwards/ downwards).

In addition, we also discussed what happened when m = 0?
(i.e the graph is a horizontal line)

The general equation of a linear graph is Y = mX + c

When m = 0, general equation becomes y = c


When the line is vertical (i.e. perpendicular to the x axis), its gradient is undefined.
We also observed how the following equations are represented:





Food for Thought: 2 Questions

(a) What is the equation of the line that lies on the x axis?
(b) What is the equation of the line that lies on the y axis?


In Summary...

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