Algebra 2 Flashcards
1
Q
Gradient of a / (positive) line
A
Rise / run
2
Q
Gradient of a \ (negative) line
A
Go to the right and then down however many down is the gradient. E.g. -4
3
Q
What is the gradient of a line?
A
How steep the line is.
4
Q
Gradient formula
A
Change in Y / change in X =
vertical change / horizontal change =
Y2-Y1 / X2-X1
5
Q
/
A
Positive gradient
6
Q
\
A
Negative gradient
7
Q
The equation of a line
A
Y = MX + C where M = gradient and C = Y intercept
8
Q
How to find the gradient when given two coordinates
A
( X1, Y1) (X2, Y2)
Y2-Y1 / X2-X1
9
Q
Parallel lines
A
All parallel lines have the same gradient.
10
Q
Perpendicular lines
A
Two lines are perpendicular if their gradients multiply to make -1. E.g. gradient = 1/4
perpendicular gradient = -1/4 = -4
