Answer:
no they are not equivalent.
Explanation:
to start, the question has mias saving rate at weekly and we need to convert that to days so we can compare to her sister. we multiply 8*7 to find the number of days which is 56. we then divide $28 by 56. mias daily saving rate is y= .5x.
for mias sister we divide 18/24 which is .75. her sisters daily saving rate is y=.75x.
this shows that the saving rates for the sisters are not equivalent