The variables x=9 and y=15 varies directly. How do you write an equation that relates the variables and find x when y=-5?
2 Answers
Explanation:
When y increases, x also increases in the same proportion and when y decreases, x also decreases in the same proportion.
So
Or
We know, y=15, x=9 and y1=5
The equation is
and
Explanation:
If
Given that
So the relating equation is
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When