Y1CH5 Straight line graphs Flashcards
1
Q
How do you work out the gradient?
A
2nd coord - 1st coord
y2-y1/x2-x1
2
Q
Another way of writing the equation of the line
A
y = mx + c
ax + by + c = o
3
Q
How do you know two lines are parallel
A
Have the same gradient
4
Q
If the two lines are perpendicular how do you know
A
gradient are -1/m of eachother
5
Q
How do you work out the length of a line
A
Pythagoras via coordinates
