CP Alg 1 - Systems Review

Front

What does a correlation coefficient of -0.99 indicate?

Back

It indicates a very strong negative relationship between the two variables in the data set.

Front

What is the solution to the system of equations 3x + y = -14 and -2x - y = 9?

Back

The solution is (-5, 1).

Front

How do you find the solution of the system of linear equations 5x - 3y = -18 and x - 6y = -9?

Back

The solution is (-3, 1).

Front

What should a residual plot look like if the model fits the data well?

Back

A residual plot should look random, indicating no patterns.

Front

Is the point (3, 1) a solution for the inequality y < 2x + 1?

Back

(3, 1) is NOT a solution for the inequality.

Front

What is a system of equations?

Back

A set of two or more equations with the same variables.

Front

What does it mean if a system of equations has no solution?

Back

It means the lines represented by the equations are parallel and never intersect.

Front

What is the graphical representation of a linear equation?

Back

A straight line on a coordinate plane.

Front

What is the purpose of a residual plot?

Back

To assess the fit of a regression model by showing the residuals on the vertical axis.

Front

What does a positive correlation coefficient indicate?

Back

It indicates that as one variable increases, the other variable also tends to increase.