Step 1= Write the variation problem
Step 2= Substitute the initial values and solve for k.
Step 3= Rewrite the variation equation with the value of k from step 2.
Step 4= Substitute the remaining values solve for the unknown and find the required answer.
Amelia
Direct variation= y varies directly as x if there exists some constant k such that. y=kx
ReplyDeletey is said to be proportional to x. The number k is called a constant of variation. In direct variation equation y=kx defines a linear fuction where the constant of variation k is the slope of the line.
ReplyDeleteDirect variation as a power= y varies directly as the ninth power of x if there exists a real number k. y=kxn
ReplyDeleteInverse Variation= y varies inversly as x if there exists a real number k such that y=k/x ^n
ReplyDeleteJoint Variation= y varies jointly as x and z if there exists a real number k such that y=kxz.
ReplyDeleteJust remember that for the direct variation as a power in the book the example is the nth power, not the ninth power because the variable is n!
ReplyDelete