Let x1 = 12, y1 = 15, and y2 = 3. let y vary inversely with x. find x2. x2 = 3.75 x2 = 177 x2 = 60 x2 = 2.4

We have that an inverse variation in a function is given by:
 
 We must find the value of the constant k.
 To do this, we substitute the values of x1 = 12, y1 = 15.
 We have then:
 
 Clearing k we have:
 
 Substituting the value of k we have that the inverse variation is:
 
 For y2 = 3 we have:
 
 Clearing x2 we have: