The answer is D.
Explanation- 28/7=4
19-4 =15
1. 10:37 and idk the second one
Question 1:
For this case we have an equation of the form:

Where,
- <em>k: inverse variation constant.
</em>
Then, substituting values we have:

From here, we clear the value of k.
We have then:

Answer:
the constant of inverse variation is:

Question 2:
For this case we have:

Where,
- <em>k: constant of variation.
</em>
Then, substituting the value of the constant we have:

We now substitute the value of x:

Answer:
the value of y when x = 4 is:

In a rhombus, opposite angels are equal.
So we have :

Hope it helps !
The answer to your question is C. -b/a