Understanding the Cover-Up Method for Graphing Linear Equations

The video tutorial introduces the cover-up method for plotting linear graphs, focusing on equations with variables on the left and constants on the right. It provides step-by-step examples, including solving equations like 3x + 2y = 12 and 3x + 5y = 15, and involves student interaction. The tutorial also covers equations with subtraction and negative coordinates, concluding with an exercise for students to practice the method.

What is the main advantage of using the cover-up method for graphing linear equations?

• It is only useful for equations with one variable.

• It makes plotting graphs with variables on the left-hand side easier.

• It eliminates the need for graph paper.

• It simplifies solving quadratic equations.

When using the cover-up method on the equation 3x + 2y = 12, what is the y-coordinate when x is 0?

• 3

• 6

• 0

• 12

For the equation 3x + 2y = 12, what is the x-coordinate when y is 0?

• 2

• 6

• 4

• 12

What is the point of intersection for the equations 3x + 2y = 12 and 3x + 5y = 15?

• (3.3, 1)

• (4, 0)

• (0, 6)

• (5, 0)

In the equation 3x + 5y = 15, what is the x-coordinate when y is 0?

• 3

• 5

• 15

• 0

For the equation 5x + y = 10, what is the y-coordinate when x is 0?

• 5

• 2

• 0

• 10

What is the x-coordinate when y is 0 in the equation 5x + y = 10?

• 10

• 5

• 2

• 0

In the equation y - 2x = 2, what is the y-coordinate when x is 0?

• -2

• 1

• 0

• 2

What is the x-coordinate when y is 0 in the equation y - 2x = 2?

• -1

• 1

• 0

• 2

What should you be cautious about when reading the point of intersection on a graph?

• The color of the lines

• The thickness of the lines

• The type of graph paper

• The scale of the axes