Level 7 Facts to memorise

Level 7 facts to memorise - flashcards

Level 7 Facts To Memorise

What is the formula for percentage change?(Amount of change/Original amount) x 100
What is 'standard form'?Number x 10power
NB Number must be greater than or = 1
and less than 10.
What is the formula for calculating the gradient (m) of a straight line?m = (diff in y)/(diff in x)
m = (y1 - y2)/(x1 - x2)
On a Distance/Time graph how do you find the speed?Calculate the gradient
On a Velocity/Time graph, how do you find the acceleration?Calculate the gradient.
On a Velocity/Time graph, how do you find the distance travelled between two times?Find the are under the graph between those two times.
(Hint: Area of a Trapezium)
What is the formula for the area of a triangle?A = bh/2
What is the formula for the area of a rectangle?A = bh
What is the formula for the area of a trapezium with parallel sides 'a' and 'b'?A = (a + b)h/2
What does a cubic look like?Like an S on its side.
What does a quadratic look like?U or ∩
What is the formula for the Volume of a prism?V = (base area) x height
What is the formula for the surface area of a prism?SA = (base perimeter) x height
What is the formula for 'Pythagoras'?h2 = a2 + b2
What is the formula for the length of a line joing the points (x1,y1) and (x2,y2)?Length = √{(x1-x2)2 + (y1-y2)2}
What is a cyclic quadrilateral?A four sided shape in whcih each of the corners touches the circumference of a circle.
How do you find the magniture of a vector X = ai + bj|X| = √{a2 + b2}
What is the formula for the area of a segment of a circle with angle 'a' at the centre?A = ∏r2a/360
What is the formula for the curved length of a segment of a circle with angle 'a' at the centre?Curved Length = ∏da/360
What is a 'line of best fit' on a scatter diagram?A straight line which goes through the points so that there are approximately an equal number of points above and below the line.
What does Q1 stand for?Q1 = Lower Quartile
What does Q2 stand for?Q2 = Median (2nd quartile)
What does Q3 stand for?Q3 = Upper Quartile
What does IQR stand for?IQR = Inter Quartile Range
What is the formula for IQR?IQR = Q3 - Q1
What information is shown on a 'box and whisker' diagram?Lowest value, Q1, Q2, Q3 and highest value.