(a)
*insert image*
The mapping shows the relationship between x and y.
using a scale of 2cm to 1unit on the x-axis and 2 cm to 2 units on the y-axis, draw two perpendicular axes 0x and 0y on a graph sheet for 1 ≤ x ≤ 5 and 0 ≤ y ≤ 14;
plot the point for each ordered pair,(x,y) .
Join the points with a straight line;
Using the graph, find the gradient of the line in 5 (a)(iii);
Use the graph to find the equation of the line in 5 (a)(iii).