Equation of a Straight Line Flashcards by Charlie Blair | Brainscape

Q

Formula to find a single point

A

Y=mx+c

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Q

Gradient Formula

A

x1-y1/x2-y2

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Q

Horizontal Line has a gradient of

A

0

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Q

Straight Line Equation

A

y-b=m(x-a)

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Q

What does (c) stand for in straight line equation

A

y-intercept

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Q

What does (m) stand for in straight line equation

A

Gradient

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Q

Circumference

A

Pi x diameter

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Q

Radius

A

C=2pi x diameter

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Q

90 degrees as a fraction

A

1/4

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Q

180 degrees as a fraction

A

1/2

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Q

Arc Length

A

AB=0/360 x pi x diameter

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Q

What does SOHCAHTOA stand for

A

Sine, cosine and tangent

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Q

Sine is equal

A

Opposite/Hypotenuse

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Q

Cosine is equal

A

Adjacent/Hypotenuse

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Q

Tangent is equal

A

Opposite/Adjacent

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Q

Sides of a triangle

A

Opposite, Hypotenuse and Adjacent

Q

Area of a triangle

A

1/2absinA

Q

a/sinA=b/sinB=c/sinC

A

Sine rule - finding a side

Q

b^2+c^2-2bcosA

A

Cosine Rule - finding a side

Q

Rule 1 - simplifying surds

A

Square root (a x b) = square root a x square root b

Q

Rule 2 - simplifying surds

A

Square root a x square root a = a

Q

Rule 3 - simplifying surds

A

Square root a/b = square root a/ square root b

Q

Rule 1 - Multiplying Indices

A

x^m x x^n = x^mn

Q

Rule 2 - Dividing Indices

A

x^m/x^n=x^m-n

Q

Rule 3 - Negative Indices

A

1/x^n=x^-n

Q

Rule 4 - Power to another Power

A

(x^m)^n=x^mn

Q

Interquartile Range

A

I.Q.R = Q3 - Q1

Q

Semi-Interquartile Range

A

S.I.Q.R = Q3 - Q1/ 2

Q

Standard Deviation

A

SD = E(x-x)^2\n-1

Q

What does Foil stand for

A

First, Outside, Inside, Last

Q

Factorising a difference of two squares - Rule

A

a^2 - b^2 = (a+b) (a-b)