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


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

6 Answers

  • 10 years ago
    Favourite answer

    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.

  • 10 years ago

    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!

  • me
    Lv 4
    10 years ago

    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.

  • What do you think of the answers? You can sign in to give your opinion on the answer.
  • Anonymous
    10 years ago

    Just draw it on a graph

  • 10 years ago

    it can on whatever line you want it to be. but if you have a certain equation it could be, but you dont have enough information given for a thorogh answer

Still have questions? Get answers by asking now.