f(x) = |2x + 5| for all real values of x

a) Sketch the graph y = f(x), showing the coordinates of any points where the graph meets the coordinate axes.

b) evaluate $\displaystyle ff(-4) $

g(x) = f(x + k) for all real values of x

c) state the value of the constant k for which g(x) is symmetrical about the y axis.

OK for part a i have sketched a line crossing the y axis at +5 and bouncing off the x axis at x=-2.5

Can anybody confirm this is right?

For part b i'm not sure what to do. I guess u work out f(-4)= |-8 + 5|

=|-3| = 3 ....???? then work out f(3)....????

part c im unsure of...