Question

Plot a line graph for the variables p and q where p is two times q i.e, the equation is p = 2q. Then find.

1. the value of p when q = 3
2. the value of q when p = 8

Answer 1

Given, equation is p = 2q

If p = 2, then q = `p/2 = 2/2` = 1

If p = 4, then q = `p/2 = 4/2` = 2

If p = 6, then q = `p/2 = 6/2` = 3

If p = 8, then q = `p/2 = 8/2` = 4

Hence, table for the graph

p	2	4	6	8
q	1	2	3	4

1. When q = 3, the value of p is 6.
2. When p = 8, the value of q is 4.