Emma had 5 seashells. Each week she collected 3 more. Let w be the number of weeks Emma collects seashells and s be the total number of seashells she has. Choose the correct statement.
A
The number of weeks, w, is the independent variable, and s=3w+5.
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B
The total number of seashells, s, is the independent variable, and s=3w+5.
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C
The number of weeks, w, is the independent variable, and s=3w–5.
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D
The total number of seashells, s, is the independent variable, and s=3w–5.
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Solution
The correct option is A The number of weeks, w, is the independent variable, and s=3w+5. The number of weeks, w, is the independent variable. The total number of seashells, s, depends on the number of weeks w, so it is the dependent variable.
Total number of seashells after w weeks, s=3w+5.