Question

Show that the points A (1,2), B(-1, -16) and C (0, -7) lie on the graph of the linear equation y=9x -7.

Answer 1

Firstly, to draw the graph of equation
y=9x-7
When x=2, then `y=9xx2-7`
`=18-7=11`
When x= - 2, then `y=9xx -2-7`
`= -18-7= - 25`

Here, we find two points D (2, 11) and E (-2, -25).
So, draw the graph by plotting the points and joining the line DE.

Now, we plot the given points A (1,2), B(-1, -16) and C(0, -7) on the graph paper. We see that all the points lie on DE line.