Move the sliders to change the coefficents a, b and c.
In .

Write all your answers in your exercise book.
1. What effect does changing 'c' have on the graph? Write the equation of 5 parabolas with a intercept of 3.
2. Change 'a' describe what efect this has on the graph. What does happens when 'a' is negative?
3. Keep coeffcient a=1 and alter coefficent b (use a table to record your results).
a) How does altering b effect the coordinate of the vertex of the graph?
b) Can you predict what the coordinate of the vertex of will be?
c) Can you find a rule that would work for every case? Does your rule work when a = 2?
4. Use the graph to decide if you could solve this equation . If you can solve it find the values of . If you can't solve it why not?
5. Use your graph to decide which of these equations are correct. Alter each incorrect equation to make it true.
a)
b)
c)
d)