Slope is . Or, in other words the distance it travels in the y direction divided by the distance it travels in the x direction. Each time the y variable increments +4 and the x variable increments +1. Which means the line rises 4 units every time it runs 1 unit.
I'm a little confused about the question but if it's asking what C= then If I'm correct it's 5.10 but FYI I have no idea if it's right so sorry if I got it wrong