Maths online lesson (t2 w1&3) (3)

Maths Online lesson (T2W1&3) William Zhao(33) Chun Yi (27)

Finding the gradients
What is gradient/slope?
-the measure of steepness.

To find the gradient of a straight line is defined as :
Rise =difference of y coordinate between any 2 points on straight line
( Divide )
Run =difference in the corresponding x-coordinates

What is a +ve slope?(positve)
-the gradient of line that goes from left to right.
What is a –ve slope?(negative)
-the gradient of line that goes from right to left.

Finding the gradients (Example)
Find the gradient of the line joining the points.
A(2,3) and B (7,5)
P(-2,8) and Q (1,-1)

Finding The Gradient (Example)
(a) Gradient = change in Y/change in X
=5-3/7-2
=2/5
(b) Gradient = change in Y/ change in X
= 8-(-1)/-2- 1
=9/-3
=-3

+VE & -VE Slope
A positive slope, or a slope with a positive gradient goes from LEFT to RIGHT
A negative slope, or a slope with a negative gradient goes from RIGHT TO LEFT

Maths online lesson (t2 w1&3) (3)

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