Reflect Points Across Axes

My Notes Level 1 Support Level 2 Standard Level 3 Enrichment

Today's objectives

Content Objective: I can reflect points across the x-axis and y-axis on the coordinate plane.

Language Objective: I can explain my work using the words reflection, x-axis, y-axis, and symmetry.

📖 See Learn It for the explanation and worked examples, and the Vocab tab for the words. These are your notes to fill in and keep.

✏️ Fill in each blank as we go. Use the Word Bank to help you.

📚 Word Bank — fill each blank with the best word

👆 Tap any word to see what it means and a picture.

Level 3: try the blanks from memory first, then check the bank.

1A flip of a point or shape over an axis to make a mirror image is a .
2The horizontal number line on the coordinate plane is the .
3The vertical number line on the coordinate plane is the .
4When two halves are mirror images of each other, the figure has .
5A whole number or its opposite, with no fraction part, is an .

Write About the Math Guided ESOL writing

Use the support level you need. Every level answers the same math question.

1. Understand the Question

explain

Reflect (4, -5) over the x-axis. Talk through how the coordinates change and where the new point lands?

Your job: Answer the question. Use math evidence. Explain how the evidence proves your answer.Responde la pregunta. Usa evidencia matemática. Explica cómo la evidencia demuestra tu respuesta.

2. Plan Your Math Words

Check at least two words you will use.

Reflection — A flipped image of a point on the other side of a line, the same distance away.Reflexión — Una imagen volteada de un punto al otro lado de una línea, a la misma distancia. x-axis — The line that goes across the grid. Flipping over it changes the y sign.Eje x — La línea que va de lado en la cuadrícula. Voltear sobre ella cambia el signo de y. y-axis — The line that goes up the grid. Flipping over it changes the x sign.Eje y — La línea que va hacia arriba en la cuadrícula. Voltear sobre ella cambia el signo de x. Symmetry — When a shape looks the same on both sides of a line.Simetría — Cuando una figura se ve igual a ambos lados de una línea. Integer — Whole numbers and their opposites, like -2, -1, 0, 1, 2.Número entero — Números enteros y sus opuestos, como -2, -1, 0, 1, 2.

Say it first: Say your idea to a partner or quietly to yourself before you write.Di tu idea a un compañero o en voz baja antes de escribir.

Over the x-axis, the ___ coordinate flips sign.Sobre el eje x, la coordenada ___ cambia de signo.

3. Build Your Explanation

Model the parts: This model shows the parts of an explanation. It does not answer your writing question.

Claim: Reflecting over the y-axis changes the ___ coordinate because ___.

Evidence: Student states reflecting over the y-axis flips the sign of the x-coordinate while the y-coordinate stays the same, so (3,2) becomes (-3,2).

Reasoning: This evidence connects the definition of reflection to the mathematical claim.

Start

Most language support

Complete the frames. Use the word bank.Completa las oraciones. Usa el banco de palabras.

Over the x-axis, the ___ coordinate flips sign.Sobre el eje x, la coordenada ___ cambia de signo.
So (4, -5) becomes ___.Entonces (4, -5) se convierte en ___.

Build

Some language support

Write two connected sentences. Use because, so, or but.Escribe dos oraciones conectadas. Usa porque, entonces o pero.

My claim is ___.Mi afirmación es ___.
I know because ___.Lo sé porque ___.
So ___.Entonces ___.

Explain

Light language support

Write a claim, give math evidence, and explain your reasoning.Escribe una afirmación, da evidencia matemática y explica tu razonamiento.

My claim is ___.Mi afirmación es ___.
My math evidence is ___.Mi evidencia matemática es ___.
This proves ___ because ___.Esto demuestra ___ porque ___.

4. Check Your Explanation

I answered the question.Respondí la pregunta. I used math evidence: numbers, an equation, a model, or a comparison.Usé evidencia matemática: números, una ecuación, un modelo o una comparación. I explained how the evidence proves my answer.Expliqué cómo la evidencia demuestra mi respuesta. I used at least two math words.Usé por lo menos dos palabras matemáticas. I reread complete sentences and punctuation.Volví a leer mis oraciones completas y la puntuación.