Question

Find the equation of the line that contains the point (9,-9) and has a slope that is undefined. Express the equation using either the general form or the slope-intercept form of the equation of a line.​

Answer 1

The equation is x=9.

What is the slope-intercept form of the equation ?

The slope-intercept form of the equation is

y =mx +c

m is the slope and c is the intercept

From the given data

-9 = m * 9 +c

c = -9 -9m

y = mx +(-9 -9m)

y = m(x-9) -9

the slope of the required line = m is undefined.

This means that the required line must be vertical line

it passes through the point (9,-9)

The equation is  x=9.

To know more about slope-intercept form of the equation

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