Intervention Flashcard: Units 1-6 Spiral Review

Front

What is the relationship shown on a scatterplot when both variables increase together?

Back

This indicates a positive correlation.

Front

How do you calculate the mean absolute deviation (MAD) of a set of numbers?

Back

1. Find the mean of the data set. 2. Subtract the mean from each data point and take the absolute value. 3. Find the average of those absolute values.

Front

What is the formula to find the break-even point in a cost comparison problem?

Back

Set the total costs of both options equal to each other and solve for the variable.

Front

In the equation y = mx + b, what does 'b' represent?

Back

The y-intercept, which is the value of y when x is 0.

Front

What does 't' represent in the context of a cell phone plan equation?

Back

The number of text messages sent.

Front

What is the definition of slope in a linear equation?

Back

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

Front

How do you interpret the slope of a line in a real-world context?

Back

The slope indicates how much the dependent variable changes for a one-unit increase in the independent variable.

Front

What is the significance of the y-intercept in a linear equation?

Back

It indicates the starting value of the dependent variable when the independent variable is zero.

Front

How can you determine if a relationship is linear from a scatterplot?

Back

If the points form a pattern that can be approximated by a straight line, the relationship is linear.

Front

What is the formula for calculating the total cost of a plan with a fixed monthly fee and a variable cost per unit?

Back

Total Cost = Fixed Fee + (Variable Cost per Unit * Number of Units).