Respuesta :
Answer:
c
Step-by-step explanation:
you have to set them up as a fraction and see if they are an equivalent fraction and if they are thats the proportion
Answer:
C is the answer
3 :1 and 9 :3
Step-by-step explanation:
a :b :: c:d = [tex]\frac{a}{b}[/tex] = [tex]\frac{c}{d}[/tex]
3 :1 and 9 :3
= [tex]\frac{3}{1}[/tex] and [tex]\frac{9}{3}[/tex]
3:1 :: 9:3 = [tex]\frac{3}{1}[/tex] = [tex]\frac{9}{3}[/tex]
3 = 3 so these two ratios are proportional
or another method is find the cross multiplication
[tex]\frac{3}{1} = \frac{9}{3}[/tex]
i.e 3 × 3 = 9 × 1
9 =9
so these two ratios are proportional
