Answer:
r = 1/2
Explanation:
y = r • x
r = y ÷ x
r = 4.5 ÷ 9 = 1/2
r = 1/2 or 0.5
1/2 is also 0.5
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r = 1/2 or .5
y = rx so
r = 4.5 ÷ 9 = 1/2 or .5
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