Answer:

Step-by-step explanation:

Let's solve the second equation for a to later on replace it in the first equation.

Now plug this into the first equation.

Distribute the 9

Break down the fraction.

Simplify.

Subtract 

Combine like terms.



Muliply by the reciprocal or inverted fraction next to b.


Now plug this value into any of the equations to find the value of a.

Answer:
In a residual plot against x that does NOT suggest we should challenge the assumptions of our regression model, we would expect to see a _____.
c. horizontal band of points centered near 0
Step-by-step explanation:
This residual graph or plot shows the residual values (or the difference between the observed y-value (from scatter plot) and the predicted y-value (from regression equation line) on the vertical axis and displays the independent variable on the horizontal axis. A linear regression model becomes appropriate for a dataset when the points are randomly dispersed around the horizontal axis near 0; otherwise, a nonlinear model becomes more appropriate.
Answer:
C and D
Step-by-step explanation:
2x^2 + 7x + 6
(2x + 3)(x+2)
x = -3/2 = -1.5
x = -2
Answer:
a^1/4*b^1/6
Step-by-step explanation:
Distribute the 1/2 exponent by multiplying 1/2 by the exponents of the variables
Mutiply them all out, you'll get quadratic equations. Replace x's with numbers and then you'll be able to draw the graphs