If given only: f(5,2) = 80 fx(5,2) = 8 fy(5,2) = -6 Suppose 80 is measured in degrees Fahrenheit. Find the direction where the temperature would get cooler. I just did 8a - 6b = 0 (since using the dot product, <8,-6> * <a,b> = 0. Then I solved for a, b, and this was the vector equation. Then the question asked, How many steps would you take to get from 80 to 78 degrees? I have no idea. Is it asking for the magnitude?