PROOF 121
Prove.
Parallel lines have equal slopes
On the coordinate plane.
Definition D1
The line ℓ(m, b) is the set of all points (x, y) satisfying y = mx + b. That is, (x, y) ∈ ℓ(m, b) ⟺ y = mx + b
Proof.
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PROOF 121
Parallel lines have equal slopes
On the coordinate plane.
Definition D1
The line ℓ(m, b) is the set of all points (x, y) satisfying y = mx + b. That is, (x, y) ∈ ℓ(m, b) ⟺ y = mx + b
Proof.
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