Question

Which statement is true?



A line parallel to the x-axis has neither slope nor y-intercept defined.



A line parallel to the y-axis has neither slope nor y-intercept defined.



A line parallel to the x-axis has slope defined, but not y- intercept.



A line parallel to the y-axis has slope defined, but not y- intercept.

Answer 1

B.....i guess..\(\Huge\ddot\smile\)

Answer 2

i like ur honesty XD thank u for the help tho :)

Answer 3

A line parallel to the y-axis has neither slope or y-intercept defined.

Remember the equation for a gradient and the main property of two parallel lines to arrive at this answer.

1) Parallel lines never cross and as the y-intercept is the spot where the line crosses the y-axis we know that there is not y-intercept for any line parallel to the y-axis.

2) the equation for a gradient is (y1 - y2)/(x1 - x2) where (x1, y1) is a set of coordinates and (x2, y2) are a set of coordinates. Now if a line if parallel to the y-axis that means that all the values of y only have one value of x. This means that x1 - x2 = 0 As you can't divide by zero the gradient is undefined.

Answer 4

wow thanks, that was alot XD i can take it from here!!

Answer 5

Pleasure! :)