Question

The dot plot represents the amount of rain recorded by rain gauges in different locations around a city
How many rain gauges recorded rainfall ?
_____ ?

Answer 1

Answer:

16

Step-by-step explanation:

There are 3 dots above 0.5, 1 dot above 0.75, 3 dots above 1, 1 dot above 1.5, 2 dots above 1.75, 3 dots above 2, 2 dots above 2.25 and 1 dot above 2.5.

This is a total of

3+1+3+1+2+3+2+1 = 16 dots.

Answer 2

The number of rainfall that the rain gauges recorded was 16

How does dot plot works?

Suppose we're measuring something whose values are numeric. For each value of that thing we observe, we plot a dot above that value in number line. Thus, the total number of dots in the dot plot tells us the total number of observations of the values of that thing we did.

Thus, suppose if we observed the value 'x', then we will make a dot above 'x'. If there is already a dot over 'x', then we will make a new dot over that dot.

For this case, there are 3+ 1+3+1+2+3+2+1 = 16 dots in the dot plot.

These are the measurement of rainfall (in inches), and there were 16 such observations.

Thus, the number of rainfall that the rain gauges recorded was 16.

Learn more about dot plot here:

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