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Question

A triangle is graphed in the coordinate plane. What are the coordinates of the image after a translation 3 unit's right and 2 unit's down?


A

A'(1,4),B'(1,1),C'(3,1)

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B

A'(1,2),B'(1,-1),C'(3,-1)

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C

A'(-2,2),B'(-2,-1),C'(0,-1)

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D

A'(0,1),B'(0,-2),C'(2,-2)

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Solution

The correct option is B

A'(1,2),B'(1,-1),C'(3,-1)


Find the coordinates of image after translation.

Given, figure

From given figure, we have given coordinates as,

A(-2,4),B(-2,1),C(0,1) and the parameters are a=3,b=-2

As we know that a figure 'a' units horizontally and 'b' units vertically in the coordinate plane. 'a' is added to x-coordinate and 'b' is added to y-coordinate of the vertices.

A(x,y)=A'(x+a,y+b)

The value of 'a' and 'b' will be positive if the shift is right and vertical Up respectively and the value of 'a' and 'b' will be negative if the shift is left and vertical down respectively.

Using the above criteria of translation.

A(-2,4)=A'(-2+3,4-2)=A'(1,2)B(-2,1)=B'(-2+3,1-2)=B'(1,-1)C(0,1)=C'(0+3,1-2)=C'(3,-1)

Hence, the coordinate of the image after transformation are A'(1,2),B'(1,-1),C'(3,-1) and correct option is (B).


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