How do I do this math problem? (please see details)

My brother needs help with his homework and the material is stuff that I learned 4 years ago. That said, I don’t really remember it. I tried looking it up but I can’t seem to find what I need.

One of the questions has a picture of a graph with a line and two points. We figured out that the points are (1,4) and (2,6). The directions say to find the slope and y-intercept of the problem.
What now? Do we use the m=y2-y1/x2-x1 formula to find the slope? And what do we do to find the y-intercept?