#1a) what's the slope of the tangent line at t=1sec? [h]=ft of ball off the ground
h(t)=1024-16*t^2
show(h(t))
show((h(1)-h(8))/(1-8))
show((h(1)-h(7))/(1-7))
show((h(1)-h(6))/(1-6))
show((h(1)-h(5))/(1-5))
show((h(1)-h(4))/(1-4))
show((h(1)-h(3))/(1-3))
show((h(1)-h(2))/(1-3))
plot(h(t),0,8)