Straight Line Graphs Flashcards
1
Q
How would you find the gradient and y intercept?
A
put the equation into y = mx + c
x is the gradient
c is the y intercept
2
Q
How do you find the gradient?
A
y2 - y1 / x2 - x1
3
Q
how can you find the new line equation, with coordinates and a gradient?
A
y - y1 = m (x - x1)
4
Q
How do you know if a line is paralell?
A
The gradients are equal
5
Q
How do you know if a line in perpendicular?
A
multiply m by m2 and see if the answer is -1
6
Q
How do you find the distance between two coordinates in an equation?
A
d = Square root ((x2 - x1)^2+(y2 - y1)^2)
7
Q
What does colinear mean?
A
Points that lie on the same line
