vector
TRANSCRIPT
Form 5: Linear Law
2.1 Line of Best Fit
- Drawing lines of best fit
If x and y are two variables related linearly, then when the values of y are plotted against the values of x, a straight line is obtained.
Graph of y against x
How is it related to the topic vector in the subtopic of
addition and subtraction? Look at the next slide so that you can
see the connection.
Connection
When we have two lines of best fit, we can add or subtract the lines. If the lines are linear, they can be added or subtracted
whether they are parallel or non-parallel to each other.
Line of best fit
The two diagrams show the line of best fit. These two lines are parallel to each other.
P
Q
R
S
PQWe have the vector and . When we add
both vectors, the resultant vector is .
RS
PS
Where,
a
aaPS
PSRSPQ
8
35
=+=
=+
Point To Be Noted
• Students should know the basic concept of
vector which needed the concept of line of
best fit. This means that the lines involved in
the topic vector should be the linear lines and
it is not necessarily parallel. It can be non-
parallel.