Question

the dot plot below represents how long it takes students in a 7th grade math class to get to school every morning.
how many students are in the class?

Explanation:

Step1: Count the number of dots

Each dot represents a student.

Step2: Sum up the dots

Count the dots at each time interval:

• At \(5\) minutes: \(4\) dots
• At \(10\) minutes: \(2\) dots
• At \(15\) minutes: \(3\) dots
• At \(20\) minutes: \(2\) dots
• At \(25\) minutes: \(2\) dots
• At \(30\) minutes: \(3\) dots
• At \(35\) minutes: \(1\) dot
• At \(40\) minutes: \(3\) dots
• At \(45\) minutes: \(1\) dot

Sum them up: \(4 + 2+3 + 2+2 + 3+1 + 3+1\)

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Answer:

\(21\)