NC Math 1 EOC Review

Front

What is a system of equations?

Back

A system of equations is a set of two or more equations with the same variables. The solution is the point(s) where the equations intersect.

Front

Define fixed charge in a rental context.

Back

A fixed charge is a constant amount that is charged regardless of usage, such as the daily rental fee for a car.

Front

What does 'linear regression' mean?

Back

Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Front

How does adding a low value to a data set affect the mean and median?

Back

Adding a low value decreases the mean because it lowers the average, but the median may stay the same if the new value does not change the middle value of the ordered data.

Front

What is the formula for calculating the new dimensions after a percentage reduction?

Back

New Dimension = Original Dimension * (1 - Reduction Percentage). For example, if the original dimension is 7 inches and the reduction is 25%, the new dimension is 7 * (1 - 0.25) = 5.25 inches.

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and will never intersect, regardless of how far they are extended.

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

How do you find the slope from an equation in standard form?

Back

To find the slope from an equation in standard form (Ax + By = C), rearrange it to slope-intercept form (y = mx + b) and identify m.

Front

What is the impact of repeated percentage reductions on a value?

Back

Repeated percentage reductions compound the decrease, leading to a much smaller final value than a single reduction of the same total percentage.

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. If there is an even number of observations, it is the average of the two middle values.