Quadratic function and exponential function question!
hi, it's me again. Thanks so much for the help last time. :)
i have this table of values:
x | y
1 | 20
3 | 320
i have to make a linear, quadratic, and exponential function from these values.
i used y-y1=m(x-x1) for the linear and came up with f(x)= 150x-130
am i supposed to use the quadratic formula to find the quadratic function? i tried but I ended up being unable to find an answer (undefined?). can someone please walk me through this? maybe I just need the values for a, b, and c.
as for the exponential function, i am completely clueless... (Doh)
as always, i am not allowed to use a calculator for these problems, so i hope someone can guide me through the steps.(Nod)