Find the average rate of change for f(x) from -2 to 4 f(x)=4x^2-1

lol it's a timed quiz but take ur time :)

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

How do i do this? i don’t understand

Don't know how to find x given these segment lengths