Answer:
No
Step-by-step explanation:
We can tell if two ratios make a proportion by creating two tests. To be a proportion, they must pass in at least one.
This first test is to determine if the ratios are directly proportional. The ratios pass this test if the product of the means is equal to the product of extremes.
4 x 9 _ 5 x 8
36 ≠ 40 FAIL
This second test is to determine if the ratios are indirectly proportional. They pass the test if the product of the left side is equal to the product of the right side.
4 x 5 _ 8 x 9
20 ≠ 72 FAIL
Since both tests failed, 4:5 and 8:9 does NOT make a proportion.
Hope this helps!
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