Find the slope of a line through the passing lines of (-7,-7) and (-3, 6)

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)