Understanding Linear Functions

What is a linear function?

• A function that forms a curved line on a graph

• A function that forms a straight line on a graph

• A function that forms a zigzag line on a graph

• A function that forms a circular line on a graph

Which of the following is an example of continuous data?

• The weight of a chocolate chip

• The number of cars in a parking lot

• The number of books on a shelf

• The number of students in a class

How can you determine if a function is discrete?

• If the graph is a solid line

• If the graph is a dashed line

• If the domain includes all real numbers

• If the domain includes only integers

What is the function to represent the total cost of nuts per pound?

• C = $5.95 * P

• C = $5.95 - P

• C = $5.95 + P

• C = $5.95 / P

In the function table, what is the cost for 3 pounds of nuts?

• $11.90

• $17.85

• $23.80

• $29.75

Why is the function for the cost of nuts considered continuous?

• Because you can only buy whole numbers of pounds

• Because you can buy any fraction of a pound

• Because the cost is always a whole number

• Because the graph is made of dots

What is the independent variable when graphing the cost of nuts?

• Number of nuts

• Price per pound

• Total cost

• Number of pounds

How do you use a function table to graph a function?

• By drawing a line through random points

• By guessing the shape of the graph

• By using only the x-values

• By plotting ordered pairs from the table

What is the first step in using a function table to graph a function?

• Calculate the slope of the line

• Plot the points on a coordinate plane

• Create ordered pairs from the table

• Draw a line through the points

What do you do after plotting the ordered pairs on a graph?

• Draw a line through the points

• Change the scale of the graph

• Erase the points

• Add more points randomly