Calculate the slope of (59,60) and (53,51) using the formula y=mx+b

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

You can find the constant of proportionality by finding the ratio of

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin