**GRAPHS **

CONTENT

- Interpreting Information Presented on a Graph (gradient; vertical and horizontal lines; intercepts with axes).
- Continuous and Discontinuous Graphs
- Linear Graphs from Real Life Situations (Distance-Time graph; Travel graph; Conversion graph; Velocity-Time graph).

**Interpreting Information Presented on a Graph**

**Example 1:**

The figure below shows the graph of y against x.

(a) Write down the coordinates of the points A and B

(b) What is the y- intercept of the straight line in the graph above?

(c) Find the coordinate of the point where the graph intersects the x-axis.

(d) Find: (i) x, when y= 2.4 (ii) y, when x = 1.2.

**Solution:**

(a) The coordinates of A = (1, 2) and B = (3, 0). The first value is for x while the second is for y, i.e.,(x, y).

(b) The y-intercept is the value of y the point the straight line intersects (cuts) the y-axis.

y-intercept = 3

c) The graph intersects the x-axis at point B = (3, 0).

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