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 10powerNB Number must be greater than or = 1and 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.