(need fast, )

what is the difference of j and k?

j(x)=x-14
k(x)=7+x

a- (j-k)(x)=-21
b-(j-k)(x)=-21+2x
c-(j-k)(x)=-7
d-(j-k)(x)=-7+2x

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)