Answer: The system’s host star, called TRAPPIST-1, is what is known as an ultracool dwarf.
Explanation:
Also called 2MASS J23062928-0502285, TRAPPIST-1 is an ultracool dwarf star that hosts three planets: TRAPPIST-1b, c, and d.
Never before planets had been found around ultracool dwarf stars, and they are considered as potentially habitable and, therefore, suitable for life outside our solar system.
Based on the calculations, a good approximation for x when f(x) = 30 is equal to: B. 20.
<h3>How to write the equation?</h3>
Based on complete information, the equation for the line of best fit for the set of values in the table is given by this function below:
f(x) ≈ 1.8x - 5.4
Thus, a good approximation for x when f(x) = 30 would be determine by substituting the value of f(x) with 30 as follows:
30 = 1.8x - 5.4
30 + 5.4 = 1.8x
35.4 = 1.8x
x = 35.4/1.8
x = 20.
Read more on line of best fit here: brainly.com/question/4674926
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<u>Complete Question:</u>
The equation for the line of best fit is f(x) ≈ 1.8x − 5.4 for the set of values in the table. Using the equation for the line of best fit, what is a good approximation for x when f(x) = 30?
A. 14
B. 20
C. 45
D. 54
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