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Sagot :

Answer:

The scale factor SF = [tex]\frac{7}{3}[/tex] C

Step-by-step explanation:

If the point (x, y) dilated by a scale factor n, then the coordinates of its image are (n x, n y)

Let us solve the question

∵ The coordinates of the point K are (-3, 6)

x = -3 and y = 6

∵ The coordinates of its image k' are (-7, 14)

→ From the rule above the image is (n x, n y)

∵ The scale factor is n

n x = -7

n y = 14

→ Substitute x by -3

n (-3) = -7

∴ -3n = -7

→ Divide both sides by -3

∵ [tex]\frac{-3n}{-3}[/tex] = [tex]\frac{-7}{-3}[/tex]

n = [tex]\frac{7}{3}[/tex]

→ Substitute y by 6

n (6) = 14

∴ 6n = 14

→ Divide both sides by 6

∵ [tex]\frac{6n}{6}[/tex] = [tex]\frac{14}{6}[/tex]

n = [tex]\frac{7}{3}[/tex]

Both coordinates gave the same value of n

The scale factor SF = [tex]\frac{7}{3}[/tex]

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