Question

Mrs. Hamilton shows her students this graph and asks them to determine how figure A was transformed to figure B.

On a coordinate plane, triangle A has points (negative 1, 0), (negative 2, 4), (negative 1, 4). Triangle B has points (3, 1), (3, 5), (4, 5)..

Marcus suggests that figure A was reflected over the y-axis and then translated 2 to the right and 1 up. Julianne agrees, and states that the transformations could happen in any order. Which best describes the accuracy of Julianne’s statement?
Accurate. A translation of figure A of 2 to the right and 1 up and then a reflection over the y-axis produces the image, figure B.
Accurate. A reflection over the y-axis and then a translation of 1 up and 2 to the right produces the image, figure B.
Inaccurate. A translation of 2 to the right and 1 up and then a reflection over the y-axis results in a figure that is located in the second quadrant.
Inaccurate. A reflection over the y-axis and then a translation of 1 up and 2 to the right results in a figure that is located in the second quadrant.

Answer 1

the best way to address these "who is right" questions is simply to test the accuracy of each person's claims

Marcus: says that figure A was reflected over the y-axis and then translated 2 to the right and 1 up, to get figure B

Julianne: says that the transformations can be applied in any order to get the same result.

therefore the easiest way to do this is simply change the order of transformation. take figure A, apply the translations, and *then* the reflection, to see what the result is