Sunday, May 9, 2010

Straight line of y = a and x = a .

Hi,
Just to recap how a straight of x = a or y = a (where a is an integer) looks like on the graph.

For the graph of x = a, it is a vertical straight line parallel to the y-axis cutting the x-axis at point 'a'. For e.g. x = -1, it is a vertical straight line cutting x at -1.

For the graph of y = b, it is a horizontal straight line parallel to the x-axis cutting the y-axis at point 'b'. For e.g. y = -2, it is a horizontal straight line cutting y at -2.

From the graph, answer these questions to test your understanding.
(i) Find the coordinates of the point where the two lines cut.
(ii) Draw a line of y = 3 and x = 5 on the graph.
(iii) Given that 1 unit represent 2 cm, find the area of the rectangle enclosed by these 4 lines.

0 Comments:

Post a Comment

<< Home