it should be 6x^2-6x if you wrote it right.
Change the percent to decimal
4%= .04
.04x = 56
solve for x
so x = 1400
The fraction of the variability in fuel economy is accounted for by the engine size is 59.91%.
Given that, r= -0.774.
To solve such problems we must know about the fraction of the variability in data values or R-squared.
<h3>What fraction of the variability in fuel economy is accounted for by the engine size?</h3>
The fraction by which the variance of the dependent variable is greater than the variance of the errors is known as R-squared.
It is called so because it is the square of the correlation between the dependent and independent variables, which is commonly denoted by “r” in a simple regression model.
Fraction of the variability in data values = (coefficient of correlation)²= r²
Now, the variability in fuel economy = r²= (-0.774)²
= 0.599076%= 59.91%
Hence, the fraction of the variability in fuel economy accounted for by the engine size is 59.91%.
To learn more about the fraction of the variability visit:
brainly.com/question/2516132.
#SPJ1
For whatever reason, Brainly questions are often missing the first character. Here, we assume it is A, so that the intended statement is ABCD~EFGH.
FG = BC*(EH)/AD = 15*60/45 = 20 . . . . inches
Option D I believe because it is the only one that passes the vertical line test (the test that for every X value, there is only 1 Y value).
