Select the coordinates A′

and B′
after dilation of the line segment AB
with a scale factor of 13
, centered at the origin where the endpoints are A(−6,3)
and B(−12,9)
.(1 point)
Responses

A′(−2,1)
and B′(−12,9)
upper A prime left parenthesis negative 2 comma 1 right parenthesis and upper B prime left parenthesis negative 12 comma 9 right parenthesis

A′(−18,9)
and B′(−36,27)
upper A prime left parenthesis negative 18 comma 9 right parenthesis and upper B prime left parenthesis negative 36 comma 27 right parenthesis

A′(−2,1)
and B′(−4,3)
upper A prime left parenthesis negative 2 comma 1 right parenthesis and upper B prime left parenthesis negative 4 comma 3 right parenthesis

A′(−6,3)
and B′(−4,3)
upper A prime left parenthesis negative 6 comma 3 right parenthesis and upper B prime left parenthesis negative 4 comma 3 right parenthesis

1 answer

To find the coordinates of points \( A' \) and \( B' \) after dilating the line segment \( AB \) with a scale factor of 13, centered at the origin, we use the formula for dilation:

\[ (x', y') = (kx, ky) \]

where \( k \) is the scale factor and \( (x, y) \) are the original coordinates.

  1. For point \( A(-6, 3) \): \[ A' = (13 \cdot -6, 13 \cdot 3) = (-78, 39) \]

  2. For point \( B(-12, 9) \): \[ B' = (13 \cdot -12, 13 \cdot 9) = (-156, 117) \]

Thus, the dilated coordinates are \( A'(-78, 39) \) and \( B'(-156, 117) \).

It appears that none of the provided response options match the calculated coordinates. Please double-check the scale factor or the original coordinates provided, as the options listed do not correspond to a scale factor of 13.

If the scale factor should actually be \( \frac{1}{13} \) instead, then the coordinates would be:

  1. For point \( A(-6, 3) \): \[ A' = \left(-\frac{6}{13}, \frac{3}{13}\right) \approx (-0.46, 0.23) \]

  2. For point \( B(-12, 9) \): \[ B' = \left(-\frac{12}{13}, \frac{9}{13}\right) \approx (-0.92, 0.69) \]

Again, none of the provided options reflect this as well. Please ensure the numbers are correct or check if another scale factor should be applied.