Write a function to represent each series of transformations: rotation of 90 degrees counterclockwise about the origin, point o, then a reflection across the x-axis

f((x, y)) = (-y, -x)

Rotation 90° CCW about the origin is the mapping ...

... (x, y) ⇒ (-y, x)

Reflection across the x-axis is the mapping ...

... (x, y) ⇒ (x, -y)

Together, these do the following mapping:

... (x, y) ⇒ (-y, -x) . . . . . . . equivalent to a reflection across y = -x

Expressed as a function, this might be written ...

... f((x, y)) = (-y, -x) . . . . . . . the ordered pair argument becomes a new ordered pair

the anwser is d) 75°

step-by-step explanation:

answer

you start with $5 and save $10 a week until you have at least $45wer

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