SOLUTION: 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

Algebra ->  Coordinate-system -> SOLUTION: 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      Log On


   

Question 661678: 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
Found 3 solutions by ewatrrr, Alan3354, josmiceli:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

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) About Me  (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) About Me  (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:
+%28+y+-+0+%29+%2F+%28+x+-+0+%29+=+%28+4+-+0+%29+%2F+%28+4+-+0+%29+
+y%2Fx+=+4%2F4+
+y%2Fx+=+1+
+y+=+x+
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 )