P- Straight line graphs- ED Flashcards
1
Q
2 ways of showing equations for lines
A
Y=mx+c or ax+by+c=0
2
Q
Equation for gradient
A
M= change in y/change in x
3
Q
Formula to get equation using gradient and one coordinate
A
y-y1=m(x-x1)
4
Q
How to work out perpendicular line
A
Gradient for new perpendicular line will be 1/m (m=gradient of original line)
5
Q
In a coordinate which is x and which is y
A
(x,y)
6
Q
if m1 x m2 = -1 what are the two lines?
A
Perpendicular
