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Ch2 Algebra 2
Variations
Question | Answer |
---|---|
Direct Variation Function | y= kx^n k doesn't equal zero n>0 |
Inverse Variation Function | y= k/x^n k doesn't equal zero n>0 |
Combined Variation | when direct and inverse variations occur together y= kx/z |
joint variation | when one quantity varies directly as the product of two or more independent variables, but not inversely as any variable. |
The rate of change from (20,25) (40, 100) | r1= 100ft-25ft/ 40mph- 20mph = 70ft/ 20mph = 3.75 ft/mph |
Fundamental Theorem of Variation | a. if y varies directly as x^n and x is multiplied by c then y is multiplied by c^n b. if y varies inversely as x^n and x is multiplied by a nonzero constant c, then y is divided by c^n |
Hyperbola | graph of every function with an equation of the form y= k/x |