Experiment with changing the values of m and c.

What effect does changing c have on the graph?[br][br]What about m?[br][br]What can you say about the line if m is negative?[br][br]What will happen to the line if m is set to zero?[br][br]Can the line ever be vertical and if so how would you write down its equation?[br][br]Can you think of a way to find out where the line crosses the y-axis from the equation?[br][br]What about where it crosses the x-axis?[br][br]If you know the x-value of a coordinate point on the line how could you find its y-value? e.g. The point (3,A) lies on the line y = 3x + 10; find A.[br][br]If you know the y-value of a coordinate point on the line how could you find its x-value? e.g. (B,5) lies on the line y =2x - 15, find B.[br][br]How could you check if a particular coordinate point lies on the line using just its equation? e.g. Does the point (2,7) lie on the line y = 6x - 5?[br][br]If you were given two points how could you find the gradient of the line going through them? e.g. (5,2) and (3,1).[br][br]Could you then find the lines' equation?[br][br]Can the line ever be vertical and if so how would you write down its equation?[br][br]Can you think of a way to find out where the line crosses the y-axis from the equation?[br][br]What about where it crosses the x-axis?[br][br]If you know the x-value of a coordinate point on the line how could you find its y-value? e.g. The point (3,A) lies on the line y = 3x + 10; find A.[br][br]If you know the y-value of a coordinate point on the line how could you find its x-value? e.g. (B,5) lies on the line y = 2x - 15, find B.[br][br]How could you check if a particular coordinate point lies on the line using just its equation? e.g. Does the point (2,7) lie on the line y = 6x - 5?[br][br]If you were given two points, how could you find the gradient of the line going through them? e.g. (5,2) and (3,1).[br][br]Could you then find the lines' equation?