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Algebra 2 test
| Question | Answer |
|---|---|
| what are the steps to system of equations - substitution method | 1. get it into y = mx + b format 2. plug the y into any equation to get x 3. Plug in x to get y |
| What are the steps to the quadratic - linear system algebraic method | 1. make both the linear and quadratic in standard form 2. Set them equal to one another 3. once you get , substitute for y |
| How do you do the quadratic linear graphing method ? | 1. Plug both functions into the calculator 2. The points that intersect are your answers |
| f(x) + a | Up (a) units |
| f(x) - a | Down (a) units |
| f(x + a) | left (a) units |
| f(x-a) | right (a) units |
| a>1 ( think! punching a tall person) | narrow |
| 0<a<1 (think! punching a small person) | Wider |
| - f (x) means reflection over the ??? | x-axis |
| f(-x) means reflection over the ??? | y- axis |
| f(2x) | Horizontal shrink |
| f(1/2x) | horizontal stretch |
| 2f(x) means what in terms of stretch | Vertical stretch, y • 2 |
| 1/2 f(x) means what in terms of stretch | vertical stretch, y • 1/2 |
| f(2x) means what in terms of stretch | horizontal stretch, x / 2 |
| f(1/2x) means what In terms of stretch | horizontal stretch, x / 1/2 |
| what is vertex form? | f(x) = a(x-h)^2 + k |
| what is vertex form? | f(x) = a(x-h) ^ 2 + k |
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