Can someone tell me how to do this i totally forgot how

First, find the slope. You would find the slope by the equation: y^2-y^1/x^2-x^1. In this case, the slope is 4/5. Next, you need to take what you know (the slope) and find the distance. Find the distance by using the distance formula: (x2-x1)^2+(y2-y1)^2 and this is all square rooted (once you get the answer, find the square root of that answer and that will be your final answer). So, the final answer is the square root of 41. You can't simplify 41 in a square root, so just leave it as square root of 41.