Answer:
option B is correct. Once have a look to this solution that I have answered
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Walgreens has the better deal
Y-intercept when x = 0
so
y = 4
(2,-1) The intersecting point is the point where the two lines meet.
Answer:
R1 = {(1, 7) (2, 7) (4, 7) (6, 7)}
R3 = {(x, y) (y, z) (z, t) (t, v)}
R1 and R3 are functions because first element in the ordered pair is not repeating, i.e they have unique images