Which is the graph of r=6cos

Step-by-step explanation:

When the angle Ф = 0, cos Ф = 6 because the coefficient of the cos function is 6.  Thus, the first point you'd want to plot would be (0, 6).

If Ф increases to π/2, cos Ф = 0.  Plot (π/2, 0).

If Ф now increases to π, cos Ф = -1.  Plot (π, -1).

And so on ...     increase Ф by π/2 each time.

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)

b

step-by-step explanation:

the word superfluous means unnecessary