Question

Write an equation of a line that passes through (9,-5) and (3,-5)

Answer 1

An equation of a line is y=mx + c
wherein m=slope or gradient
and c is the y-intercept.
So technically, you have to achieve this format.

The easiest way is by following the "point-slope" formula which is:
\[y - y_1 = m(x - x_1)\]

The points are: (9, -5) and (3, -5)
Wherein y1 = -5, y2 = -5, x1 = 3, x2 = 9

Substitute.

Next, find the slope, using the formula:
slope = change in y/ change in x

Substitute and solve.

Answer 2

thnk u

Answer 3

This video is really helpful: http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/v/linear-equations-in-point-slope-form

:)