Hello I need a bit of help on another math problem please.

Substitute (0,b) into (m or b)=change in y/change in x=Y2-Y1/X2-X1
I am not sure what you would substitute (0, b) into. This does not make sense?

Finally you simplify this equation to arrive at (y=mx, x=my+b, x=my-b, y=mx+b)

I think it is y=mx+b would I be right on this?

My answer is you would substitute (0,b) into m and you would arrive at y=mx+b

Is this right?

I can help you understand how to substitute the values (0, b) into the equation (m or b) = (Y2 - Y1) / (X2 - X1).

When substituting (0, b) into the equation, it means that you need to replace the variables (X2, Y2) or (X1, Y1) with the values from the point (0, b). Since the point is (0, b) and the x-coordinate is 0, you would substitute 0 for X2 or X1.

Let's say you want to substitute (0, b) for (X2, Y2). The equation would then become:
(m or b) = (Y2 - Y1) / (0 - X1)

Simplifying further, you would have:
(m or b) = (b - Y1) / -X1

Now, if you substitute (0, b) into the equation, it would look like this:
(m or b) = (b - Y1) / -X1

Remember, this is just one possibility for substituting the values (0, b) into the equation. Depending on the specific problem you are working on, you may need to substitute (0, b) into different parts of the equation.