Write an equation in standard form for the line that passes through the given points. (0,-6) and (7,0)

What is the line in standard form is ___?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?