Pure: Equation Of Lines (chris)

Question 1

Equation of straight line

Answer 1

Y=mx+c or Y-Y(1)=m(X-X(1))

Question 2

Find y-intercept

Answer 2

Make x=0

Question 3

Find x-intercept

Answer 3

Make y=0

Question 4

Midpoint

Answer 4

(x+x)/2 (y+y)/2

Question 5

M=

Answer 5

Gradient

Question 6

C=

Answer 6

Y intercept

Question 7

Length

Answer 7

[(y2-y1)^2+(x2-x1)^2] all squared