Answer:
input = 6 leads to output = 15
input = 9 leads to output = 21
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Explanation:
If the input is x = 6, then,
y = 2x+3
y = 2(6)+3
y = 12+3
y = 15 is the output
Repeat those steps for x = 9
y = 2x+3
y = 2(9)+3
y = 18+3
y = 21 is the output
