Equations

Question 1

Slope

Answer 1

M = y2-y1

x2-x1

Question 2

Length of a line

Answer 2

L = square root of

(x2-x1)^2 + (y2-y1)^2

Question 3

Midpoint of a line

Answer 3

M = (x1+x2 , y1+y2)

2 2

Question 4

Point slope

Answer 4

y = m(x-p)+q

Question 5

Equation of a circle

Answer 5

X^2 + y^2 = r^2

Question 6

Vertex form

Answer 6

Y=a(x-h)^2+k

Question 7

Quadratic formula

Answer 7

x = -b+-(square root)b^2-4(a)(c)

2a

Question 8

Standard form

Answer 8

ax^2 + bx + c = 0

Question 9

Factored form

Answer 9

y=a(x-r)(x-s)