Scatter Plots and Trend Lines GAME DAY

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a trend line represent in a scatter plot?

Back

A trend line is a straight line that best represents the data points in a scatter plot, indicating the general direction of the data.

Front

How do you find the initial value in a linear equation?

Back

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

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 calculate the slope of a line given two points?

Back

The slope (m) is calculated using the formula m = (y2 - y1) / (x2 - x1) where (x1, y1) and (x2, y2) are the coordinates of the two points.

Front

What does a positive slope indicate about a trend?

Back

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

Front

What does a negative slope indicate about a trend?

Back

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

Front

What is the purpose of estimating values from a scatter plot?

Back

Estimating values from a scatter plot helps to make predictions about one variable based on the observed relationship with another variable.

Front

What is the best fit line?

Back

The best fit line is the line that minimizes the distance between itself and all the data points in a scatter plot.

Front

How can you determine the best fit line visually?

Back

You can determine the best fit line visually by drawing a line that has approximately equal numbers of points above and below it.