Answer:
a.) y = 3x b.) y = -2x
Step-by-step explanation:
a) Passes through A(2,6) and B(4,12).
slope = (12 - 6)/ (4 - 2) = 6/2 = 3
y - 6 = 3 * (x - 2)
y = 3x - 6 + 6 ,
y = 3x
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b.) Passes through the origin (0,0) and has a slope of -2
use y = mx +b
m = -2, b =0
y = -2x
