Question

y
7
6-
(1,6)
5-
-4+
3-
2-
1+
-0-
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
(-1,-2) (0,-1)
x
-1
-2-
(-2,-3)
-3-
--4-
-5-
--6-
-7-


(1,6)
(0,-1)
(-1,-2)
(-2,-3)

Answer 1

The four marked points are:
- (1, 6)
- (0, -1)
- (-1, -2)
- (-2, -3)

Notes:
- The last three, (0,-1), (-1,-2), and (-2,-3), are collinear — they lie on the line y = x - 1.
- (1,6) is not on that line. The line through (1,6) and (0,-1) has slope 7 and equation y = 7x - 1.
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