Quiz 4: Lesson 2.1.1 - 2.1.3

What happens to the coordinates of a point when it is reflected over the y-axis?(Use your notes from Lesson 2.1.2 or 2.1.3)

• The x-coordinate changes sign or to its opposite

• The y-coordinate changes sign or to its opposite

• Both coordinates change sign

• Neither coordinate changes

Tags

CCSS.8.G.A.3

What happens to the coordinates of a point when it is reflected over the x-axis? (Use your notes from Lesson 2.1.2 or 2.1.3)

• The x-coordinate changes sign or to its opposite

• The y-coordinate changes sign or to its opposite

• Both coordinates change sign

• Neither coordinate changes

Tags

CCSS.8.G.A.3

If a figure is translated 5 units to the right and 3 units up, what is the rule for this transformation?

• (x, y) → (x + 5, y + 3)

• (x, y) → (x - 5, y - 3)

• (x, y) → (x + 3, y + 5)

• (x, y) → (x - 3, y - 5)

Tags

CCSS.8.G.A.3

Describe the sequence of transformations that maps triangle ABC to triangle A'B'C' if A'B'C' is a reflection of ABC over the x-axis followed by a translation 3 units up.

• Reflect over the x-axis, then translate (x, y) → (x, -y) → (x, -y +3)

• Reflect over the y-axis, then translate (x, y) → (-x, y) → (-x, y +3)

• Reflect over the x-axis, then translate (x, y) → (x, -y)→ (x, -y -3)

• Reflect over the y-axis, then translate (x, y) → (-x, y)→ (x, -y-3)

Tags

CCSS.8.G.A.4

Categorize the words to its correct column for the transformation translation (slide).

Groups:

(a) x-coordinates

,

(b) y-coordinates

• Right Direction - Positives

• Left Direction - Negatives

• Up Direction - Positives

• Down Direction - Negatives

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflect the Points (2,2), (4,2), and (4,4) across the y-axis. Plot the new coordinate points. (Use your notes from Lesson 2.1.2 or 2.1.3)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflect the Points (-8,2), (-4,2), and (-8,6) across the x-axis. Plot the new coordinate points. (Use your notes from Lesson 2.1.2 or 2.1.3)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Rotate the triangle ABC about the vertex C (3, 1), 90 degrees clockwise. Plot your new points.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The rule for reflection over the y-axis is  
(x, y) --> _

• (-x, y)
• (x, -y)
• (y, x)
• (-y, x)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The rule for reflection over the x-axis is  
(x, y) --> _

• (-x, y)
• (x, -y)
• (y, x)
• (-y, x)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5