# Is (2,-1) a point on the line? Show the steps to show it's true or not true?

Update:

a=(-5,2) b=(5,-3),----points on the graph, the slope is (-1,2)

Relevance

Take the equation of the line,

substitue "2" for "x" and "-1" for "y" ; and see if you get an indentity.

If you get an identity, the point lies on the line;

otherwise, it does not lie on the line.

• You did not give the equation of the line ( I am assuming a line is a straight line. usually it comes in the form 2x+4y=5 or in the form y = 4x + 1). Then as one of the answers provided , try x = 2 and y = -1 in the equation. If it satisfies the equation, you got a point on the line! If it doesn't, then the point is not on the line! Wa lah!

Even if the line is not a straight line say x^2 + y = 7, the above method still works!

• If you graph those points you will find that they are not in a straight line

• Anonymous
10 years ago

It does not lie on the same straight line...

Maybe if it s a curved line, it is possible...

So, The point doesn't lie on the same straight line.