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level: Vocabulary

Questions and Answers List

level questions: Vocabulary

QuestionAnswer
meanthe average of a set of numbers add all the numbers and divide by how many numbers there are
medianthe number in the MIDDLE of a set of data (data must be in order from least to greatest!)
modethe number in a set of data that occurs the MOST
rangethe difference between the smallest and largest numbers in a set of data
order of symmetryhow many times the picture looks the EXACT same as you rotate it around
you can only add and subtract fractions with the same...denominator
gradient/slopechange in y divided by change in x the measure of how steep a line is
y-interceptwhere the graph crosses the y-axis
originthe center of a coordinate plane (0,0)
parallel lines always have the same...gradient/slope
angles in a triangle add up to...180
isosceles triangle2 sides are equal and 2 angles are equal
scalene triangleall three sides and angles are different
obtuse90 < angle < 180
acute0 < angle < 90
reflex angle180 < angle < 360
what does "make x the subject" mean?change the equation so it's x =
expandmultiply what's outside the brackets with what's inside the brackets (distribute) or if it looks like (x + 2)(x + 3) then FOIL
FOIL: what does that mean?multiply the FIRST terms, then the OUTER terms, then the INNER terms, then the LAST terms
factor/factorizetake an expression and put it back into brackets, often looking for a highest common factor to "factor out"
highest common factorfind the largest factor two numbers have in common (factors are the numbers you multiply together to get the number)
least common multiplethe smallest multiple two numbers have in common (multiples are the answers to a number's multiplication tables. example multiples of 5 are 5, 10, 15, 20, 25, etc.)
prime factorizationthe prime numbers that you can multiply to get a number, use a factor tree
rotationturn (list angle of rotation, clockwise or counterclockwise, and the center of rotation)
translationslide (list the vector x on top and y on bottom)
reflectionflip (list equation of mirror line y = or x =)
enlargementmake bigger or smaller (list scale factor-compare the side lengths, and find center of enlargement-drawing lines from each point)
the letters x and y are going to be in your expressionwrite an expression in terms of x and y means..
the largest a rounded number can beupper bound
the lowest a number can belower bound
what does solve simultaneous equations mean?You need to find the x value and the y value that make BOTH equations true! Usually use elimination method.
nth terma rule for a sequence involving the letter n
line of best fita line drawn with an equal number of points above and below it