Draw the graph of the following equations:

y = –3

y = -3 means the y co-ordinate is fixed and we can take any value of x

to draw graph we will require two points

let us consider point P whose x co-ordinate be 2 and y co-ordinate is already given as -3

⇒ P (2, -3)

Now consider point Q whose x co-ordinate be 4 and y co-ordinate is already given as -3

⇒ Q (4, -3)

Plot points P and Q and join them to get the graph of y = -3

Hint: x = a is always a straight line parallel to Y-axis and passing through (a, 0) whereas y = a is always a straight line parallel to X-axis and passing through (0, a)