exam Maths Puzzle Numerical Ability

Refer to the graph given below and identify the graph that represents the corresponding function. Justify your answer.
y = 2x
y = log2x
Please help me I can't figure this out

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exam Other Question
Stan invested $5,000, part at 8% and part at 17%. If the total interest at the end of the year is $490, how much did he invest at 8%? ( a + 4b) - (a + b)
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