1. ## straight line graphs

i have a question about straight line graphs.
what does it mean when the line passes through the origin?
what does it mean when it doesnt?

many thanks

2. Originally Posted by decoy808
i have a question about straight line graphs.
what does it mean when the line passes through the origin?
what does it mean when it doesnt?

many thanks
The original is the special name for the point (0,0). It acts like any other ordered pair (a,b)

3. Originally Posted by decoy808
i have a question about straight line graphs.
what does it mean when the line passes through the origin?
what does it mean when it doesnt?

many thanks
hi
well,when a line passes through the origin ( which is the couple $(0,0)$) the $y$ intercept will equal zero.and hence any line that passes through the origin will have the equation $y=mx$.

4. Originally Posted by Raoh
hi
well,when a line passes through the origin ( which is the couple $(0,0)$) the $y$ intercept will equal zero.and hence any line that passes through the origin will have the equation $y=mx$.
Almost true. The line x= 0 passes through the origin but does not have that form.