Scatter Plots, Linear Equations, Slope, Y-Intercept

a relationship between two variables in which the data do increase and decrease together at the same rate

• Linear association

• positive association

• No association

• negative association

the line on a scatter plot that help show the correlation between data sets more clearly

• y-intercept

• Trend line

• slope

• Scatter plot

a graph with points plotted to show a possible relationship between two sets of data

• Trend line

• scatter plot

• slope

• y intercept

a measure of the steepness of a line on a graph; the rise divided by the run

• Trend line

• Scatter plot

• Slope

• y intercept

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 

• As the temperature increases, the number of visitors increases. 

• As the visitors increase, the temperature decreases. 

• No correlation

The linear regression equation for the data is  y = 1.5x + 12.  Interpret the slope of the equation.

• The slope is (0, 1.5).  It means that a pizza with 0 toppings will cost $1.50.

• The slope is 1.5.  It means that it costs $1.50 per topping.

• There are 1.5 toppings.

• There are 1.5 pizzas.

What relationship is shown in the scatter plot?

• As the cost goes down, the number sold goes down.

• As the cost goes up, the number sold goes down.

• As the cost goes down, the number sold remains the same.

• There is not relationship between cost and the number sold.

What is the trend for this scatter plot

• Negative

• Positive

• None

the y-coordinate of the point where the graph of a line crosses the y-axis. (x is always 0 and y can be any number)

• Trend line

• Scatter plot

• Slope

• y intercept

a system of equation that have different slopes will always intercept at least once

• One solution

• No solution

• Infinite solutions