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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?
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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?

User Ewgenij Sokolovski
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2 Answers

2 votes

Answer:

20

Explanation:

User Stelterd
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7.9k points
3 votes
We need to solve the equation for x:
f(x) ≈ 1.8x − 5.4
f(x) = 30

Then 1.8x − 5.4 = 30
1.8x = 30+5.4
1.8x = 35.4
x = 35.4/1.8
x = 19.66

Using the equation for the line of best fit, a good approximation for x is 20.
User Leonid Dashko
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7.1k points
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