Coordinate Geometry

[violet bay]

Get the y intercept of L

That's point D

Then use the distance formula for the coordinates of C and D

[silver goblet]

well its -2y

cuz x -2y -4=0

of line L eqn

[violet bay]

The intercept is at x=0

[silver goblet]

so (0,-2)?

[violet bay]

No you need to sub x=0 into the equation of the line

[silver goblet]

thats too little work for 3 marks

[violet bay]

Then solve for y to find the coordinate

[silver goblet]

Oh igh so it's just

y = -2

cuz (0) - 2 y - 4 = 0

-2 y = 4

y = -2

[violet bay]

Yea correct

Oh my bad

[silver goblet]

hah its ok

[violet bay]

Yea its 0,–2

[silver goblet]

so thats the cord

ah right then

i got the rest

the square root form

[violet bay]

👍

[silver goblet]

thanks

[violet bay]

Yea