Answer:
(a) (1, -3)
(b) (2, -2)
Explanation:
You want to identify two points on the line through (3, -1) that has a y-intercept of -4.
Graph
Graphing the line and points is suggested. The attached shows that graph, and identifies the two points on the line as ...
(1, -3) and (2, -2)
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Additional comment
The equation of the line is x-y=4, so you can tell if the points fall on the line by seeing if they have that difference.