a biologist measured the length and mass of 20 reptiles. the equation y = 0.3x - 2 is the line of best fit for the data, where x is the length, in centimeters, and y is the mass, in grams.
Based on the equation, what is the approximate length of a reptile that has a mass of 20.5 grams?
answers:
62 cm
66 cm
70 cm
75 cm
To find the approximate length of a reptile that has a mass of 20.5 grams, we can rearrange the given equation, y = 0.3x - 2, to solve for x.
0.3x - 2 = 20.5
Add 2 to both sides of the equation:
0.3x = 22.5
Divide both sides of the equation by 0.3:
x = 75
Therefore, the approximate length of a reptile that has a mass of 20.5 grams is 75 cm.
So the correct answer is:
75 cm
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what is the median of 6, 7, 8, 9, 10, 11
To find the median of a set of numbers, you arrange them in ascending order and then determine the middle value.
For the set of numbers 6, 7, 8, 9, 10, 11, the numbers are already in ascending order.
In this case, there are six numbers, so the median would be the average of the two middle values. The two middle values are 8 and 9.
To find the average, you add the two middle values and divide by 2:
(8 + 9) / 2 = 17 / 2 = 8.5
Therefore, the median of the set 6, 7, 8, 9, 10, 11 is 8.5.
what is the median of 4, 5, 6, 7, 8, 9,
To find the median of a set of numbers, you arrange them in ascending order and then determine the middle value(s).
For the set of numbers 4, 5, 6, 7, 8, 9, the numbers are already in ascending order.
In this case, there are seven numbers, so the median would be the middle value. Since there is an odd number of values, there is only one middle value, which is 6.
Therefore, the median of the set 4, 5, 6, 7, 8, 9 is 6.