Equation if points are satisfactory

[Calpalned]

Homework Statement

Homework Equations

n/a

The Attempt at a Solution

How was A+B = 0 derived? Is this a general definition?

 

[SammyS]

Homework Statement

View attachment 90521

Homework Equations

n/a

The Attempt at a Solution

How was A+B = 0 derived? Is this a general definition?

They used substitution.

 

[Calpalned]

They used substitution.

I'm sorry, I don't quite get that.
What was substituted? Are they saying y = 0?

 

[SammyS]

I'm sorry, I don't quite get that.
What was substituted? Are they saying y = 0?

The coordinates of the point (ln(2), 3/4) give x and y. Right?

Also the coordinates of (0, 0) give another x and y pair.

 

[Calpalned]

I overlooked the word "origin", but now it makes sense. Thanks