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range - ✔✔the difference between the highest and lowest scores in a distribution (think: greatest - least) mode - ✔✔The value that occurs most frequently in a given data set. (think: Most Often) median - ✔✔Middle number (think: med = mid) mean - ✔✔average (add then divide) permutation - ✔✔An arrangement of objects in which order is important combinations - ✔✔a grouping of items in which order does not matter (5x4x3x2x1) difference of two squares - ✔✔a² - b² = (a + b)(a - b)
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range - ✔✔the difference between the highest and lowest scores in a distribution (think: greatest - least) mode - ✔✔The value that occurs most frequently in a given data set. (think: Most Often) median - ✔✔Middle number (think: med = mid) mean - ✔✔average (add then divide) permutation - ✔✔An arrangement of objects in which order is important combinations - ✔✔a grouping of items in which order does not matter (5x4x3x2x1) difference of two squares - ✔✔a² - b² = (a + b)(a - b) product of powers - ✔✔add the exponents if the base is the same quotient of powers - ✔✔subtract the exponents if the base is the same Slope Formula, given 2 points - ✔✔rise/run or change in y over change in x slope intercept form - ✔✔y=mx+b, where m is the slope and b is the y-intercept of the line. x intercept - ✔✔where the graph crosses the x-axis; (x, 0)
y intercept - ✔✔where a line crosses the y-axis (0,y) two lines are parallel if - ✔✔their slopes are equal two lines are perpendicular to each other if - ✔✔their slopes are negative inverses integer - ✔✔All whole numbers (both positive and negative) and zero. power of zero - ✔✔any number raised to the zero is always equal to one negative exponents - ✔✔With a negative exponent, take the reciprocal of the base and change the exponent to be positive prime number - ✔✔A whole number that has exactly two factors, 1 and itself. composite number - ✔✔A whole number greater than 1 that has more than two factors. power of a power - ✔✔Keep the base, multiply the exponents