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Module 4

Variation and Problem Solving

What equation defines direct variation? y=kx
What equation defines inverse variation? y=k/x
What equation defines joint variation? y=kxz
y=(kxz^2)/h<br>is an example of:<br>A. direct variation<br>B. inverse variation<br>C. joint variation<br>D. combined variation D. combined variation
Fill in the blank:<br>In the equation y=kx, "k" represents the ________. constant of variation<br>or<br>constant of proportionality
Fill in the blank:<br>In the equation y=k/x, y varies _________ as x. inversely
If y varies directly as x, what is the constant of variation k:<br>y=8 when x=56 k=1/7
What equation represents the statement?<br>m varies jointly as j and the cube of c. m=kjc^3
What equation describes the variation?<br>n varies directly as r and inversely as t^3 n=(kr)/t^3
If y varies inversely as x, what is the constant of variation and the inverse variation equation for:<br>y=5 when x=3 The constant of variation is: k=15<br><br>The inverse variation equation is: y=15/x
Created by: Morris Cuyler