Exam Revision
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The general equation for a straight line is ? | y=mx + c
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| In y=mx + c, the gradient is ? | m
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| In y=mx + c, the y-intercept is ? | c
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| The y-intercept is the place where the line cuts which axis? | the y axis
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| The x-intercept is the spot where the line cuts which axis? | the x axis
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| The co-ordinates are written as ? | (x, y)
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| To calculate gradient from a graph, we can use | gradient = rise ÷ run
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| To calculate gradient from 2 points, we use the formula | m= (y2-y1)÷(x2-x1)
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| Does the x-axis go left to right or up and down? | left and right
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| Does the y-axis go left to right or up and down? | up and down
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| To calculate the side of a right angled triangle, given 2 sides we use... | Pythagoras' theorem
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| To calculate the length of the hypotenuse, we use the rule | c squared = a squared plus b squared,
c = square root of answer
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| To calculate the length of the shorter side, we use the rule | a squared = c squared minus b squared,
a = square root of answer
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| In a right angled triangle, c is known as the | hypotenuse
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| SOA means | sin(angle) = length of the opposite side ÷ length of the hypotenuse
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| CAH means | cos(angle) = length of the adjacent side ÷ length of the hypotenuse
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| TOA means | tan (angle) = length of the opposite side ÷ length of the adjacent side
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| If sin(angle) = 0.5, the angle is | sin-1(0.5) = 30 degrees
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| In a census, we interview | everyone involved
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| In a survey, we interview | a sample of the population
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| Types of data: is your name nominal or categorical | categorical
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| Type of data: height is a nominal data - but is it discrete or continuous | continuous
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| How many suits in a pack of cards | four
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| How many diamonds in a pack of cards | 13
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| How many cards altogether in a pack of cards | 52
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| The first 5 prime numbers are: | 2, 3, 5, 7 ,11
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| Rate of change is another word for | gradient
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| The rule for speed is | distance ÷ time
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| How many seconds in a day? | 60*60*24=86400
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| If y is directly proportional to x, we can say that y= ? | y=k*x where k is the constant of proportionality (same as the gradient)
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| How do we calculate mean? | Add up the scores. Divide by how many scores there were. (Same as the average)
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| What is the mode? | The most common value. A data set can have more than 1 mode.
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| What is the median? | The middle value.
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| What is the range? | The largest value minus the smallest value.
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Created by:
srolfe
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