Y=1/2x i think , cuz the rate of change is 1/2
The answer is D
You just move all numbers to the left and set it equal to 0
And then you add all same variables together
After that you use the quadratic formula
Answer:
B and c
Step-by-step explanation:
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
Step-by-step explanation:
3x+6+4x-20=10
7x-14=10
7x=24
x=24/7
