Year 9 Standard Linear Equations and Graphs

The y-axis goes ...

• up and down (it is vertical)

• left and right (it is horizontal

The x-axis goes ...

• up and down (it is vertical)

• left and right (it is horizontal

Coordinates are always written in which order?

• (x, y)

  x value and then y value,

  alphabetical order

• the order doesn't matter

• (y, x)

  y value always first

What are the coordinates of the y-intercept?

• (0, -3)

• (-3, 0)

• (1.5, 0)

• (0, 1.5)

What are the coordinates of the x-intercept?

• (0, -3)

• (-3, 0)

• (1.5, 0)

• (0, 1.5)

For this graph, what does y equal when x equals 2?

• 1

• -2

• -1

• -3

For this graph, what does y equal when x equals 3?

• 1

• 3

• -1

• -3

For this graph, what does x equal when y equals 2?

• 2.5

• 3.5

• 0

• 4.5

At the y-intercept, x always equal ...

• zero

• a negative

• a positive

• a different number

A linear functions contains the points shown in that table. What are the coordinates of the y-intercept (hint: where does x = 0)

• (0, 5)

• (5, 0)

• (1, 7)

• (2, 9)