Mia practices her flute for 30 minutes each evening. This can be represented by the equation \( t=30 \mathrm{~d} \).

What is the independent variable in the equation above?
A. 30 minutes
B. the number of days
C. total pinutes practiced
D. total number of days

Answer

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Answer

Identify the correct option as B. the number of days.

Steps

Step 1 ：Identify the given equation: \(t = 30d\).

Step 2 ：Recognize that the dependent variable is \(t\) and the independent variable is \(d\).

Step 3 ：Identify the correct option as B. the number of days.