Quadratic graphs (parabola)
- Mr Campbell
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)