Data on tuition and mid-career salary are collected from a number of universities and colleges. The result of the data collection is the linear regression model ˆ y = − 0.8 x + 166 where x = annual tuition and y = average mid-career salary of graduates, both in thousands of dollars. Which quantity is the independent variable? average mid-career salary of graduates annual tuition Correct According to this model, what is the average salary for a graduate of a college or university where the annual tuition is $30,000? $ 24166 Incorrect What is the slope of this regression model?

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

2/3

step-by-step explanation:

a

step-by-step explanation:

strong negative correlation