area = constant * length ^2
1/4 area = constant * (length/x)^2
x^2 = 4
x = 2
divide all lengths by 2
area scales with square of length ratio
if photo is 10 by 20, area - 200
divide lengths by 2
5 by 10 , area = 50
which is 1/4 of original area
David wants to reduce
a rectangular image on his computer so that
the new image has 25% of the area of the
original image. How should David modify
the image? Justify your answer.
1 answer
1 answer