a) a(x) = 3x +7 b) b(x ) = x2 - 20x c) c(x) = 40 1 x2+20 e) e(x) = - 1 d) d(x) = (x-2) (x+7) V3x+6 f) f(x) = Vitx - 1 X Plot each function on a separate x-y coordinate system. a) Based on the plots above, estimate the domain and range and state the result using interval notation. (Hint: You may have to change the interval values in the plot command to see a complete graph.) b) Identify the type of function for each of the above functions, i.e. rational, exponential, etc? c) In general, what can you say about the domain for each type of functions