We have that diameter=20 in---------------> r=d/2--------> 20/2---------> r=10 in [length of a circumference]=2*pi*r-------> 2*pi*10-------> 20*pi in
we know that 1 revolution----------------> 20*pi in 3 revolutions (one second)----------------> X X=3*20*pi---------> X=60*pi in ( this is in one second)
1 foot--------------> is equal to 12 in X-----------------> 60*pi in X=60*pi/12--------> 5*pi ft------------> 15.708 ft---------> 16 ft (in one second)
Well if you use graph paper you can graph the points you already have and then you can find the slope of the line easiest that way, the next point would be. (-1,8)
