Algebra 1 Test 9 – Matrices and Central Tendencies Vocabulary A Absolute Value: The distance from zero on a number line. Associative Property- (a + b) + c = a + (b + c) B Binomial – two terms C Coefficient - a number that is connected to a variable by multiplication or division. Commutative Property- (a)(b) = (b)(a) Constant - a number that is not connected to a variable by multiplication or division. D Difference- subtraction Direct Variation – y = kx where k is the constant of variation. Distance Formula Distributive Property- a(b + c) = ab + ac Domain - the set of all x values. Dependent – the range or y-value for a function. E Expression- something you simplify and does not have an equals. Equation- something you solve and has an equals. Exponential Equation – y = abx F FOIL Method – a method used to multiply two binomials together “First, Outside, Inside, Last” Function – a relation that for every x value there is only one y value. G Growth factor – the number b in an exponential function y = abx I Independent – the domain or x-value for a function. Initial Value – the beginning value or the a value in an exponential function y = abx L Linear equation- an equation whose graph is a line. Line of best fit- the trend line that shows the relationship between two sets of data. M Maximum – the highest point in a parabola that opens downward Mean – the average of a set of numbers or data. Median – if a set of numbers is put in ascending order, this is the number in the middle. Midpoint Formula - Minimum – the lowest point in a parabola that opens upward. Mode – the number that occurs most often in a set of data. Monomial – one term O Ordered pair- made up of an x-coordinate and y-coordinate. Origin - place where the x-axis and y-axis meet. P Parallel Lines - Lines with the same slope but different y-intercepts. Perimeter - to add all the sides together. Perpendicular Lines – Lines with slopes that are opposite reciprocals. Product – multiply Polynomial – many terms Q Quadrants - four sections that make up the coordinate plane. Quotient - division. Quadratic – an equation with x² and graphed in the shape of a parabola. Quadratic Formula – used to solve a quadratic equation X = -B ± √B² - 4AC 2A R Range - the set of all y values. And the difference between the largest and smallest number form given data. Rate of change- allows you to see the relationship between two quantities that are changing. S Slope- rise over run, change in y over change in x, vertical change over horizontal change. Slope-intercept form of a linear equation- y = mx +b. Standard form of a linear equation- Ax + By = C. Standard form of a quadratic equation - Ax² + Bx + C = 0 Sum- addition. System of Equations: A set of equations that share a common point(s). (intersect) System of Inequalities: A set of inequalities that share common points (overlap) T Term- these are separated by add, subtract, equals, and inequalities. Trinomial – three terms V Variable- an unknown. Vertex – The highest or lowest point in a parabola. X X-axis- horizontal axis. Y Y-axis- vertical axis Y-intercept- the y coordinate of the point where a line crosses the y-axis.