STAAR Review 9 - Trend Lines & Linear vs. Non Linear

Front

What is a trend line in a scatter plot?

Back

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

Front

What does a positive association in a graph indicate?

Back

A positive association indicates that as one variable increases, the other variable also tends to increase.

Front

What is the difference between linear and non-linear relationships?

Back

Linear relationships can be represented by a straight line, while non-linear relationships cannot and may involve curves or other shapes.

Front

How can you predict values using a trend line?

Back

You can predict values by extending the trend line and finding the corresponding value on the other axis.

Front

What is the significance of the slope in a linear equation?

Back

The slope indicates the rate of change between the two variables; a steeper slope means a greater rate of change.

Front

What does it mean if a scatter plot shows no clear trend?

Back

It means there is no significant relationship between the two variables being plotted.

Front

How do you determine if a relationship is linear or non-linear from a graph?

Back

You can determine this by observing the shape of the data points; if they form a straight line, it's linear; if they curve or scatter, it's non-linear.

Front

What is the formula for a linear equation?

Back

The formula for a linear equation is typically written as y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is zero.

Front

How can you estimate values from a scatter plot?

Back

You can estimate values by finding the corresponding x-value on the trend line and reading the y-value.