y = 2x + 7
y = 2x – 3
A(1, -1)
y = 2x + 7
-2x + y – 7 = 0
2x – y + 7 = 0
d_{A, r_1} = |2(1) – (-1) + 7| / √((2)^2 + (-1)^2) = |2 + 1 + 7| / √(4 + 1) = 10 / √(5) = 10√(5) / 5 = 2√(5)
y = 2x + 7
y = 2x – 3
A(1, -1)
y = 2x + 7
-2x + y – 7 = 0
2x – y + 7 = 0
d_{A, r_1} = |2(1) – (-1) + 7| / √((2)^2 + (-1)^2) = |2 + 1 + 7| / √(4 + 1) = 10 / √(5) = 10√(5) / 5 = 2√(5)