Lin Reg & Systems Exam Review

Front

What is a positive correlation?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What is a negative correlation?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What is the equation of a line that passes through the points (3, 4) and (0, -5)?

Back

y = 3x - 5

Front

What system of equations can be used to find the number of dimes (d) and nickels (n) if there are 80 coins totaling $6.60?

Back

d + n = 80 and 0.10d + 0.05n = 6.60

Front

How do you solve a system of equations using elimination?

Back

To solve using elimination, manipulate the equations to eliminate one variable, then solve for the remaining variable.

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

What does the slope of a line represent?

Back

The slope represents the rate of change of y with respect to x.

Front

What is the y-intercept of a line?

Back

The y-intercept is the point where the line crosses the y-axis (x=0).

Front

What is a system of equations?

Back

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

Front

What does it mean for a system of equations to be consistent?

Back

A consistent system has at least one solution.