Question

for making a scatter plot of the data set, which would be the best scale and interval for the axis that represents the amount of fluoride?

water (l)	2	1	1.5	4	3	1	5
fluoride (mg)	1.1	0.8	1.2	3.2	1.6	0.2	3.6

0 to 4 with intervals of 2
0 to 4 with intervals of 0.2
2 to 5 with intervals of 0.5
1 to 4 with intervals of 1

Explanation:

Step1: Find the minimum and maximum values of fluoride

The minimum value of fluoride in the data - set is 0.2 mg and the maximum value is 3.6 mg.

Step2: Analyze each option

• Option 1: 0 to 4 with intervals of 2. Intervals of 2 are too large, and the data points will not be plotted accurately.
• Option 2: 0 to 4 with intervals of 0.2. This range (0 - 4) covers the minimum (0.2) and maximum (3.6) values of fluoride, and an interval of 0.2 is small enough to accurately represent the data points.
• Option 3: 2 to 5 with intervals of 0.5. The range starts at 2, which does not cover the minimum value of 0.2 mg of fluoride.
• Option 4: 1 to 4 with intervals of 1. The range starts at 1, which does not cover the minimum value of 0.2 mg of fluoride.

Answer:

0 to 4 with intervals of 0.2