Graphs of Equations in Two Variables

On the coordinate plane, which line is the x-axis?

• Horizontal Line (Side to Side)

• Vertical Line (Up and Down)

What is the algebraic equation for this table?

• y = x + 3

• y = 3x

• y = x ÷ 3

• y = x - 3

What is the algebraic equation for this table?

• y = 480x

• x = y/480

• x + 480 = y

• 480 - x = y

Which equation matches the table?

• y = x

• y = 5x

• y = x - 4

• y = x + 4

What is coordinate X?

• (5,2)

• (2,3)

• (4,4)

• (6,6)

What equation represents the relationship between the variables in the table?

• d=10t

• d=t-9

• d=10-t

• d=t+10

The graph shows the number of points y, a player earns in a video game based on the number of diamonds the player collects, x. Which equation best represents the relationship between x and y?

• x = y + 75

• y = x + 75

• y = 75x

• x = 75y

Rolando’s backpack weighs 2.5 pounds when it is empty. The total weight in pounds, y, of Rolando’s backpack when it contains x pounds of books is represented by the equation

y = x + 2.5. Which table best represents this situation?

• A

• B

• C

• D

The table below shows the relationship between x and y. What equation represents the same relationship?

• y = 4x

• y = x - 9

• y = ¹/4 x

• y = x + 9

Which statement describes the relationship between x and y in these two equations?

• In y = 5x and y = x + 5, the value of y is 5 times the value of x.

• In y = 5x and y = x + 5, the value of y is 5

  more than the value of x.

• In y = 5x the value of y is 5 more than the

  value of x, and in y = x + 5 the value of y is

  5 times the value of x.

• In y = 5x the value of y is 5 times the value

  of x, and in y = x + 5 the value of y is 5 more than the value of x.