Question

doebthe slope always have to be in fraction form

Answer 1

yes the slope is a ratio of the change in the dependent variable compared to the corresponding change in the independent variable
slope = y2 -y1/ x2 - x1 where (x1, y1) is the initial value and (x2, y2) is the second set of values

Answer 2

The slope formula is always in fraction form, but a slope can be any real number, including numbers not written in fractional form