Question:
Plot a line graph for the variables p and q, where p is four times q, i.e., the equation is p = 4q.
Using the graph, find the value of (i) p, when q = 6 and (ii) q, when p = 20.
Solution:
We have $p=4 q$
(i) When $q=6$
then $p=4 \times 4=16$
(ii) when $p=20$
then, $20=4 \mathrm{q}$
$5=\mathrm{q}$
And the graph of p = 4q is given by
(4).png)
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