Higher Straight Line Flashcards
1
Q
a positive gradient
A
slopes left to right
2
Q
a negative gradient
A
slopes right to left
3
Q
gradient of 0
A
horizontal
4
Q
undefined gradient
A
line is vertical
5
Q
if two lines are parallel
A
gradients are equal
6
Q
how to calculate a median
A
- find midpoint
-calculate gradient
-calculate equation
7
Q
what is the distance formula
A
d = \sqrt{(x_2 - x_1)^2 + (y_2-y_1)^2}
8
Q
perpendicular lines meet at
A
right angles
9
Q
how to calculate altitude
A
find gradient
find perpendicular gradient
use y-b=m(x-a)
10
Q
how to calculate perpendicular bisector
A
use midpoint M
Find gradient
Find perpendicular gradient
Use perp gradient and y-b=m(x-a)
11
Q
for points of intersection
A
y=y
