[br]Drag the sliders to observe what happens when you change the x value, the y value, and the slope (m).[br][br]The x value in the point is represented by the blue slider. The y value of the point is represented by the pink slider. The slope - the rate of change between two points on the line - is represented by the red slider.[br][br][br]
What happens to the line when you make the x value larger? What happens in the equation?
It moves to the right. In the equation, the value is subtracted from x.
What happens to the line when you make the x value smaller? What happens in the equation when you make the x value negative?
It moves to the left. When the x value is negative, it is still subtracted from x. We would normally write this as x plus a number (minus a negative is the same as plus).
What happens to the line when you make the y value smaller? What happens in the equation?
It moves down. In the equation, the value is subtracted from y.
What happens to the line when you make the y value larger? What happens in the equation when you make the y value negative?
It moves down. When the y value is negative, it is still subtracted from y. It is written as y minus the negative number. We usually write this as y plus a number. Subtracting a negative is the same as adding a positive.