The y intercept point is correct at -3.
This equation has a negative slope, so the line will essentially look opposite/mirrored to the one you drew.
Slope is rise over run, and if this slope was positive you would go up 1 and over to the right 4 and plot your point.
But since the slope is negative you will start at your y-intercept and go DOWN 1 and over 4 to the right, and/or up 1 and 4 to the LEFT.
Look at the photo for graph. Hope you figure it out! Good luck.