QUESTION IMAGE
Question
dilation of a point
score: 5/9 penalty: 1 off
question
what is the image of (-8,8) after a dilation by a scale factor of 1/4 centered at the origin?
answer
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Step1: Aplicar fórmula de dilatación
Para una dilatación centrada en el origen con factor de escala $k$, si el punto es $(x,y)$ el nuevo punto $(x',y')$ se obtiene como $x' = kx$ e $y'=ky$. Aquí $k = \frac{1}{4}$, $x=-8$ e $y = 8$.
Step2: Calcular la nueva coordenada $x$
$x'=\frac{1}{4}\times(-8)= - 2$
Step3: Calcular la nueva coordenada $y$
$y'=\frac{1}{4}\times8 = 2$
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$(-2,2)$