d=r•t , formula show a joint variation , Option C is the answer.
The variation when a variable is dependent upon two or more variables and varies directly as either of them are taken constant is called Joint Variation.
According to the question , which among the options shows a Joint Variation.
Option 1 d = 50 t
It shows direct variation , as increase in t will directly increase d 50 times * the increase
Option 2 d = 16t²
It also shows direct square variation .
Option 3 d=r•t
In this variation d is dependent on two variables and so it is a joint variation.
Therefore Option C is the answer.
The complete question is ?
Which distance formula or formulas show a joint variation? d=50t, d=16t^2, d=r•t
To know more about Joint Variation
https://brainly.com/question/12250735
#SPJ1
