Question

Write the equation of the line that passes through the points left bracket, minus, 9, comma, 9, right bracket(−9,9) and left bracket, 9, comma, 9, right bracket(9,9). Put your answer in fully simplified point-slope form, unless it is a vertical or horizontal line.

Answer 1

it is a straight horizontal line

Explanation:

the given co-ordinates are:

x1, y1 = -9, 9

x2, y2 = 9, 9

equation of the line in point - slope form is,

y = mx + c

where slope, m = y2 - y1 / x2 - x1

= 9 - 9 / 9 + 9

= 0/18 = 0

thus, slope = 0 means that the line is a straight horizontal line