and Functions Questions And Marking
Scheme.
How does a repeated root look like for the discriminant? - Answer
How does two distinct real roots look like for the discriminant? - Answer
How does no real roots look like for the discriminant? - Answer
What does y = af(x) mean? - Answer Stretch with scale factor a in the y direction
What does y = f(ax) mean? - Answer Stretch with scale factor 1/a in the x direction
What does y = f(x) +a mean? - Answer Translation +a in the y direction
What does y = f(x +a) mean? - Answer Translation -a in the x direction
What does y = -f(x) mean? - Answer Reflection in the x axis
What does y = f(-x) mean? - Answer Reflection in the y axis
How does the graph y = 1/x look? - Answer x can't = 0
How does the graph y = -1/x look? - Answer x can't = 0
How does the graph y = 1/x^2 look? - Answer x can't = 0