Scale factor of enlargement
= $\frac{image\;distance}{object\;distance}$
K = $\frac{4 - 0}{2 - 0}$ = $\frac{4}{2}$ = 2
For y-co-ordinates
$\frac{K - 3}{5 - 3}$ = 2
K - 3 = 4; K = 7
johnmulu answered the question on March 6, 2017 at 11:36
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