| mean | the average of a set of numbers
add all the numbers and divide by how many numbers there are |
| median | the number in the MIDDLE of a set of data (data must be in order from least to greatest!) |
| mode | the number in a set of data that occurs the MOST |
| range | the difference between the smallest and largest numbers in a set of data |
| order of symmetry | how 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/slope | change in y divided by change in x
the measure of how steep a line is |
| y-intercept | where the graph crosses the y-axis |
| origin | the center of a coordinate plane (0,0) |
| parallel lines always have the same... | gradient/slope |
| angles in a triangle add up to... | 180 |
| isosceles triangle | 2 sides are equal and 2 angles are equal |
| scalene triangle | all three sides and angles are different |
| obtuse | 90 < angle < 180 |
| acute | 0 < angle < 90 |
| reflex angle | 180 < angle < 360 |
| what does "make x the subject" mean? | change the equation so it's x = |
| expand | multiply 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/factorize | take an expression and put it back into brackets, often looking for a highest common factor to "factor out" |
| highest common factor | find the largest factor two numbers have in common (factors are the numbers you multiply together to get the number) |
| least common multiple | the 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 factorization | the prime numbers that you can multiply to get a number, use a factor tree |
| rotation | turn (list angle of rotation, clockwise or counterclockwise, and the center of rotation) |
| translation | slide (list the vector x on top and y on bottom) |
| reflection | flip (list equation of mirror line y = or x =) |
| enlargement | make 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 expression | write an expression in terms of x and y means.. |
| the largest a rounded number can be | upper bound |
| the lowest a number can be | lower 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 term | a rule for a sequence involving the letter n |
| line of best fit | a line drawn with an equal number of points above and below it |
