[ Closed ] How do I enter this in Graph?

Open Graph software.
Select the "Function" menu.
Select "Insert Function".
In the "Function equation" field, fill in with "-4x+3" (without the quotes).
Press OK.

On the left section of the Graph screen, your function now appears just under the "Axes" item.
Double-click on Axes, that should open a dialog box.
Under the "x-axis" tab, set the minimum to -10, the maximum to +10.
Under the "y-axis" tab, set the minimum to -10, the maximum to +10.
Under the "Settings" tab, set the "Axes style" to "crossed".

You should be all set and see the function correctly within the screen.
Have fun!