Ragan Unit 4 Review

Front

What is a function notation?

Back

Function notation is a way to write functions that makes it clear which variable is the input. For example, f(x) = 2x - 3 indicates that f is a function of x.

Front

How do you identify a positive correlation in a scatter plot?

Back

A positive correlation in a scatter plot is identified when the points tend to rise from left to right, indicating that as one variable increases, the other variable also increases.

Front

What does a negative correlation indicate in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease, which is shown by points that slope downwards from left to right.

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you determine the slope from the equation y = -25x + 170?

Back

The slope is the coefficient of x in the equation. For y = -25x + 170, the slope is -25.

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept represents the value of y when x is 0. It is the point where the line crosses the y-axis.

Front

How can you predict values using a trend line in a scatter plot?

Back

You can predict values by finding the corresponding y-value for a given x-value along the trend line.

Front

What is the purpose of a line of best fit?

Back

The line of best fit is used to summarize the relationship between two variables in a scatter plot, helping to make predictions.

Front

What does it mean for a scatter plot to have no correlation?

Back

No correlation means there is no discernible relationship between the two variables; the points do not show any trend.

Front

How do you write the equation of a line of best fit?

Back

To write the equation of a line of best fit, you can use statistical methods like linear regression to find the best-fitting line through the data points.