Question: 2. Determine if the set A of all intersection points in R2 of the family of lines {y = mx : m e Z}

2. Determine if the set A of all intersection points in R2

2. Determine if the set A of all intersection points in R2 of the family of lines {y = mx : m e Z} with the family of circles {r2 + y? =r :r Q} is countable or uncountable. Here A is the set of all points in R2 that are on at least one of the lines y = mx (m e Z) and at least one of the circles r2 + y = r (r e Q).

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