Note on Direct Variation

Finding the Formula for Direct Variation.
In this lesson let me help you on direct variation.Direct variation relations have the form y = kx where x and y are variables and k is a non-zero constant. The formula for a direct variation relationship can be found with the following steps.

Step 1: Translate the statement into a direct variation formula.

y is directly proportional to x means

y =k·x

Step 2: Substitute known values to find k.
Step 3: Substitute k and write the formula.

Examples

u is proportional to v. If u = 16 when v = 4, then write the formula for the relation between u and v. This could also help us on maths project class 10

Step 1: Translate the statement into a direct variation formula.

u is proportional to v means

u =k·v

Step 2: Substitute known values to find k.

16 = k· 4

k=164=4

Step 3: Substitute k and write the formula.
u =4v
Conclusion: the formula to express the relationship between u and v is u =4v
I hope my information on this topic is more helpful to you in understanding this. Keep reading and leave your comments.