Here are some words and phrases that, if you know them, will help you be more successful on the Regents Exams.
Sum - Add
Difference - Subtract
Product - Multiply
Quotient - Divide
Rational - Any number that can be expressed as a fraction (example 4/3).
Irrational - A number that has a repeated decimal with no pattern (example 3.45678377284....)
Functions - Linear, Exponential, Absolute Value, Square Root, Piecewise
Piece-wise Function - A function with more than one relation
Input - The x values of a function.
Output - The y values of a function.
Domain - All possible x values of a function.
Range - All possible y values of a function .
Equivalent - The same.
Axis of Symmetry - the line that cuts a function in half, usually expressed as "x = __ "
Constant - A number by itself (with no variable)
Coefficient - The number next to a variable (example 4x).
Correlatiion - The relationship between two relations.
Correlation Coefficent - A number from -1 to 1 that tells you how closely the equation of the line of best fit models the data (closer to 1, positive correlation, closer to 0 no correlation, closer to -1, negative correlation)
Evaluate - to substitute a given number for a variable.
Function Rule - An equation that describes a function.
Intersection - Where two functions meet (on a graph or otherwise)
Line of best fit - The most accurate line that represents data on a graph.
System of equations - two or more equations.
System of inequalities - two or more inequalities.
Parabola - The graph of a quadratic function (x squared)
Radical - A number under a square root sign.
Rate of change - The slope of a function.
Reciprocal - flipping a fraction.
Slope - The rate of change of a function.
Slope formula - (y2 - y1) / (x2 - x1)
Monomial - A polynomial with one term.
Binomial - A polynomial with two terms.
Trinomial - A polynomial with three terms.
Vertex - The highest or lowest point on a parabola.
Vertical line test .- If you draw a vertical line through a relation at any point and the line only touches the relation one time then the relation is a function.
Y intercept - Where a function crosses the y axis.
X intercept - Where a function crosses the x axis.
Zeros of a function - Where a function crosses the x axis, or the value that will cause the function to equal zero.
Solutions of a function - The zeros of a function.