this is not a word problem and should be solved using Algebrator's Line wizard titled "Slope of the line joining two points"; to locate this wizard, press the Wizard button and expand the Line category

please use one of the following links to obtain a free trial of the program:

Windows: https://www.softmath.com/tr/alg51win-tr-en.exe

Mac: https://www.softmath.com/tr/alg51mac-tr-en.dmg