It will take her 13 weeks to save enough money for a trip to the Six Flags amusement park
Comparison is an effort to compare two or more objects in terms of shape or size, or number
Proportional Comparisons / Directly proportional are comparisons of two or more numbers where one number increases, the other numbers also increase at the same rate
Can be formulated
[tex]\displaystyle \frac {x1} {y1} = \frac {x2} {y2}[/tex]
so that if:
x = 2
then
[tex]\displaystyle y ={ \frac {y} {x} \times \: 2}[/tex]
While the reversal value comparison / inversely proportional is the comparison of two or more numbers where one number increases, the other number decreases in value
or when one value decreases at the same rate that the other increases
Can be formulated
[tex]\displaystyle \frac {x1} {y2} = \frac {x2} {y1}[/tex]
so that if:
x = 2
then
[tex]\displaystyle y = \frac {x} {y} \times \: 2[/tex]
Michelle wants to save $150
she saves $12 each week
the number of weeks needed to save money
every weeks , she save $12 or we can make equation 1:
1 weeks = $12
the amount of money needed to travel to the six flags amusement park
= $150
we can make equation 2
? weeks = $150
Because this includes Proportional Comparisons / Directly proportional,
from two equation above , we can make comparison :
[tex]\displaystyle \frac{1\:weeks}{\$12} =\frac{x\:weeks}{\$150}[/tex]
[tex]\displaystyle x\:weeks=\frac{\$150\times1\:weeks}{\$12}[/tex]
[tex]\large{\boxed{x\:weeks= 12.5}}[/tex]
or we round up to :
[tex]\large{\boxed{\bold{13\:weeks}}}[/tex]
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Keywords: save money,a trip to park, Proportional Comparisons / Directly proportional
