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B15 Writing Equations



HORIZONTAL LINE-                                  VERTICAL LINE-
slope is 0                                                             slope is undefined
equation is y = 3                                                  equation is x = 3

Exercises

1.      For the following state the co-ordinates of the point-

a.  x intercept of - 3                                                b.  y intercept of 4
c.  x intercept of 7                                                   d.  y intercept of - 6

2.      Write the equations of the lines-

a.  ( 8, - 3) and ( 8, 4)                                            b.  ( 7, 2) and ( 3, 2)
c.  x intercept of 9 and ( 9, - 6)                               d.  ( 4, -3) and y intercept of - 3

3.      Write the equations of the lines-

a.  vertical, passes through (- 3, - 6)                       b.  vertical, passes through (2, -1)
c.  horizontal contains the point (4, 7)                      d.  vertical, contains the point (-5,  0)
e.  horizontal contains the point ( 8, 2)                     f.  horizontal, contains the point (- 4, 4)

4.      Write the equations of the lines in standard form-

a.  slope = - 2, y intercept = 7                                b.  slope = 4, y intercept = - 1
c.  slope = - , y intercept = - 8                           d.  slope = , y intercept = 2
e.  slope = , y intercept =                             f.  slope = , y intercept =
g.  y intercept = 4, contains point (10, - 8)              h.  y intercept 6, contains point (- 6, 2)

i.  x intercept = 8, contains point (2, - 3)                 j.  x intercept = - 3, y intercept = 9

k.  x intercept = 4, contains point (- 4, - 6)             l.  slope = 0 passes through ( 3, 5)

5.      Find the equation in slope y-intercept form and then graph-

a.  (
- 2, 2) and ( 2, - 10)                                        b.  ( 2, 4) and (- 1, 7)
c.  ( 1, 6) and (- 2, - 9)                                          d.  (- 3, - 4) and ( 5, 12)
e.  (- 5, - 3) and ( 10, 0)                                        f.  ( 8, - 3) and (- 2, 2)

Click here for the answer key