Please I need help with show the steps

100 points, hi, i’m not sure how to get the equation from the graph and table.

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?