Question

The graph of a line through (2,3) that is perpendicular to the line with equation x = -1 also goes through which point?

How to work this????

Thanks.

Answer 1

perpendicular to the line with equation x = -1 means that your new line must be a horizontal line.
All horizontal lines have equation of the form y = c, where c is the y-coordinate of a point on that line.
So looking at our point (2,3) the equation must simply be

y = 3

Answer 2

The answers to choose from are (0,-1); (-2,3); (2,-4); or (1,4)

Answer 3

ok then
which of those points has y = 3 ????