Answer:
the answers are : A , B , and E. i just took the assignment.
Step-by-step explanation:
Answer:
31.25
Step-by-step explanation:
Answer:
a) y = 0.74x + 18.99; b) 80; c) r = 0.92, r² = 0.85; r² tells us that 85% of the variance in the dependent variable, the final average, is predictable from the independent variable, the first test score.
Step-by-step explanation:
For part a,
We first plot the data using a graphing calculator. We then run a linear regression on the data.
In the form y = ax + b, we get an a value that rounds to 0.74 and a b value that rounds to 18.99. This gives us the equation
y = 0.74x + 18.99.
For part b,
To find the final average of a student who made an 83 on the first test, we substitute 83 in place of x in our regression equation:
y = 0.74(83) + 18.99
y = 61.42 + 18.99 = 80.41
Rounded to the nearest percent, this is 80.
For part c,
The value of r is 0.92. This tells us that the line is a 92% fit for the data.
The value of r² is 0.85. This is the coefficient of determination; it tells us how much of the dependent variable can be predicted from the independent variable.
Answer:
15600
Step-by-step explanation:
120x130=15600
20x30=600
& you can work from there if you have to show work
Also you have a nice day too!
Answer:
y = x -2
Step-by-step explanation:
Equation of the line : y =mx + b
m = 1
y = 1x + b
Plugin x = 4 and y =2 in this equation
2 = 1*4 + b
2 -4 = b
b = -2
Equation: y = x - 2
