Hi, I need help with this one. I'm completely new to the concept behind it so I'm fairly confused about how to go about it.

I know I should be using this: y - y1 = m(x-x1)

For the first one: y1 = 4, x1 = 6

So, y - 4 = m (x - 6)

This is where I'm stuck cause I think I'm missing something. What do I do with the y =4, as well as the x=10? I do not know how to connect them together. Or I should consider this: y2 -y1/x2-x1 = 0 - 4 / 10 - 6 = -1. So m = -1. The solution: y - 4 = -1 (x-6).

y - 4 = -x + 6

y = -x + 10.

I'm unsure of how to go through the problem or if I need a derivative for this. Your help will be very much appreciated. Thank youuu