How many lines through the origin make angles of 45 degrees with both the +x and +y axis.?

Answer 1

There are two. y = x and y = -x

Answer 2

Any line passing throughout the time of the beginning would be of the type y=x.(reason is that the generic equation is y=mx+c.because of the fact the line passes by beginning the y intercept(c) would be 0 ensuing in y=mx). yet it fairly is for a line with slope a million. So the required line would be y=-x(this line passes by beginning and has slope -a million). Substituting the given factor we get 4=-a. this means a=-4.

Answer 3

Only one where x=y. If negative values were allowed there would be more.