This document discusses methods for finding the equation of a straight line in coordinate geometry. It defines the x-intercept as the x-coordinate where the line crosses the x-axis, and the y-intercept as the y-coordinate where the line crosses the y-axis. It presents different methods for calculating the gradient (slope) of a straight line, including using two points on the line, the x and y-intercepts, or a general formula relating the change in y over the change in x. Worksheets are also provided for practicing these methods.

1. ADDITIONAL MATHEMATICS FORM 4 COORDINATE GEOMETRY 6.4 EQUATION OF STRAIGHT LINE

2. 6.4 EQUATION OF STRAIGHT LINE 6.4.3 Finding the gradient of straight line using X-intercept and y-intercept 6.42 Finding the gradient of a straight line 6.4.2 6.4.1 Determining x -intercept and y- intercept

3. The x-intercept of a straight line is the x-coordinate where the Straight Line crosses the x-axis. X-INTERCEPT Y-INTERCEPT The y-intercept of a straight line is the y-coordinate where line crosses the y-axis. 6.4.1 Determining the x-intercept and y-intercept Definition

4. The x-intercept of a straight line is the x-coordinate where the Straight Line crosses the x-axis The y-intercept of a straight line is the y-coordinate where line crosses the y-axis.

5. WORKSHEET 1

7. Gradient is a quantity which measure how step a straight line is sloping with reference to the horizontal The gradient of a straight line is the ratio of vertical distance to horizontal distance Gradient: Gradient = Vertical line Horizontal line @ m = y 2 -y 1 x 2 -x 1 6.4.2 Find the gradient of a straight line 1 3 2

8. A (x 1 ,y 1 ) Horizontal distance B (x 2 ,y 2 ) vertical distance y x Gradient = Vertical line Horizontal line m = y 2 -y 1 x 2 -x 1 gradient of a straight line is the ratio of vertical distance to horizontal distance

9. WORKSHEET 2

11. WORKSHEET 3

12. m = y 2 -y 1 x 2 -x 1 Gradient = Vertical line Horizontal line RECALL PREVIOUS SUBTOPIC

13. m = - y intercept x-intercept 6.4.3 Finding the gradient of a straight line by using x-intercept and y-intercept Gradient

14. summary Determining x -intercept and y- intercept Finding the gradient of a straight line Finding the gradient of straight line using X-intercept and y-intercept Gradient = Vertical line Horizontal line m = y 2 -y 1 x 2 -x 1 m = - y intercept x-intercept

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