Understanding Ratios and Coordinate Graphing

In this lesson, students learn to use ratio tables to create coordinates and plot them on a coordinate plane. The lesson covers deriving equations from tables and applying them to solve word problems. Students explore the additive property of ratio tables and learn to graph points accurately. The video also explains how to choose the correct equation to solve different types of problems, emphasizing the relationship between pies and cups of sugar.

What is the first step in using a ratio table to create coordinates?

• Identify the origin on the coordinate plane

• Take the ratios from the table

• Calculate the slope of the line

• Draw the axes on the graph

How many cups of sugar are needed for 4 pies if each pie requires 3 cups?

• 9 cups

• 12 cups

• 15 cups

• 18 cups

What is the purpose of the origin on a coordinate plane?

• To separate the X and Y axes

• To mark the end of the graph

• To serve as a reference point for plotting

• To indicate the maximum value

How do you determine the number of boxes to skip when plotting on the X-axis?

• Multiply the number of points by 2

• Divide the total number of boxes by the number of points

• Add the number of points to the total boxes

• Subtract the number of points from the total boxes

How do you connect the plotted points on a coordinate plane?

• With a curved line

• With a dotted line

• With a zigzag line

• With a straight edge

What is the equation to find the cups of sugar needed for a given number of pies?

• P * 3 = C

• P / 3 = C

• P + 3 = C

• P - 3 = C

What is the relationship between pies and cups of sugar in the ratio table?

• Additive

• Multiplicative

• Divisive

• Subtractive

If you have 27 cups of sugar, how many pies can you make?

• 6 pies

• 15 pies

• 12 pies

• 9 pies

What operation is used to go from cups of sugar to pies?

• Addition

• Division

• Multiplication

• Subtraction

Which equation would you use if you know the number of pies and need to find the cups of sugar?

• C / 3 = P

• P * 3 = C

• C * 3 = P

• P / 3 = C