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 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...