The line on the graph passes through the points A (1, 3) and B (7, 1). YA
a) Calculate the gradient of line AB.
b) Find the gradient of a line perpendicular
to AB.
+
A
D
c) Find the equation of the line passing
through point (4, 2) and perpendicular
to AB.

Step-by-step explanation:

a) gradient of AB

  or

  Slope of AB

b)

when lines are perpendicular to each other, the product of their slope = - 1

That is ,

c) Equation of the line perpendicular to line AB and passing through ( 4 , 2 )

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values