To find out how many weeks it will take for Jan to reach $600 by saving $25 per week, we can set up the equation based on her current amount and her weekly savings.
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Start with her current amount: $130
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We want to find out how much more she needs to save to reach $600:
\[ 600 - 130 = 470 \]
So, she needs to save an additional $470.
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Now, divide the amount she needs to save by her weekly savings:
\[ \frac{470}{25} = 18.8 \]
Since Jan can only save a whole number of weeks, we round up to the next whole number.
Therefore, she will need 19 weeks to save enough money to reach $600.