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STAAR Key words
Must know basic vocabulary for STAAR
| Term | Definition |
|---|---|
| Asymptote | Boundary the graph does not cross. Y=0 is the equation. |
| Causation | one event causes another, example: exposure to sun causes sunburn |
| Y-Intercept | Where the graph crosses or touches the y axis. |
| Correlation Coefficient | a decimal between -1 to 1 that shows how closely related two events are, closer to 1 (or -1) is strong. Closer to zero is weak. |
| Slope | the rate of change of a linear function, the rise over run, “m” |
| Y as a Function of X | a function has no repeating x-values and passes the vertical line test |
| Zero | the point or points where a graph crosses the x-axis, AKA: roots, x-intercepts, solutions |
| Vertex | the point where a parabola changes directions, the minimum or maximum point |
| Axis of Symmetry | the x = equation that divides the parabola into identical halves |
| Domain | all the x-values of a function, left to right |
| Range | all the y-values of a function, f(x) values, bottom to top |
| Rate of Change | the amount of vertical change for each unit of horizontal change, same as slope |
| Solution to a System | the point (x,y) of intersection of two lines, infinite and no solution are also options |
| Solution to a Quadratic | the zeroes or x-intercepts of a quadratic, it can be 1, 2 or no answer. |
| Solution to an Inequality | the shaded region of an inequality, or on the solid line. Dotted line not included. |
| Steeper | moves up faster than it does over.; harder to ride your bike up |
| X-Intercept | the point (?, 0) where a graph crosses the x-axis (right/left axis), AKA: roots, zeros, solutions |
| Dependent Quantity | the variable that depends on the other one, y is dependent on x |
| Independent Quantity | the variable that is depended upon, x is independent |
| Minimum | the lowest y-value of a graph |
| Maximum | the highest y-value of a graph |
| Parent Function – Linear | y = x, straight line with a slope of 1 that goes through the origin |
| Parent Function – Quadratic | y = x2 parabola that is sitting on the origin opening up |
| < | less than, shade below dotted line. |
| <= | less than, shade below solid line |
| Direct Variation (varies directly) | A proportional relationship. Graph always goes through (0,0) |
| Perpendicular | Forms a right angle (90 degrees). The slopes are reciprocal (opposite sign and flipped upside down). |
| Vertical Stretch | Gets narrower. Stretches from top and bottom. The “a” value gets farther away from zero. |
| Vertical Shrink or compression | Gets wider. Shrinks from top and bottom. The “a” value gets closer to zero (closer to a flat line). |