Respuesta :

mhanifa

Answer:

See below

Step-by-step explanation:

The coordinates of given points on the graph:

  • A(-1, 3), B(4, 1), C(1, 7), D(6, 5), E(1.5, 6), F(3, 3)

Use of slope formula:

  • m = (y2 - y1)/(x2 - x1)

11.........................................................................

a) Slope of AB:

  • (1 - 3)/(4 + 1) = - 2/5

b) Slope of CD:

  • (5 - 7)/(6 - 1) = -2/5

c) AB and CD are parallel as slopes are same

12.........................................................................

a) Slope of EF:

  • (3 - 6)/(3 - 1.5) = - 2

b) Slope of AD:

  • (5 - 3)/(6 + 1) = 2/7

c) EF and AD are neither parallel nor perpendicular

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