Hi,

begin by finding the slope m

P (0,0) and 

Q (4,4)   m = -4/-4 = 1

using the point-slope

 y - 0 = 1(x-0)

   y = x 

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
 I am using the point slope to write an equation.  The points given are P (0,0) and Q (4,4). not sure where to begin

------------

In both points, y = x



 

Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
 2 points are all you need to determine a straight line

This is the formula:









This is a line with slope = +1 and y-intercept at the origin

The formula is just

( change in y ) / ( change in x ) = ( change in y ) / ( change in x )

 

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