A kind of variation in which when one variable changes the other changes in proportion to the first.
a.Direct
b.Inverse
c.Joint
d.Combined​


Sagot :

Answer:

letter A. Direct

Step-by-step explanation:

A relationship is said to have direct variation when one variable changes and the second variable changes proportionally; the ratio of the second variable to the first variable remains constant. For example, when y varies directly as x, there is a constant, k, that is the ratio of y:x.