Hello, thank you for taking the time to post your question!
First, you need to find the slope of the new line. The slope of the given line is -8. A perpendicular line has a slope that is the negative reciprocal of the original slope, which is 1/8.
Then, you can use the point-slope form with the new slope and the point (-3, -1) to find the equation.
After simplifying that all the way it should end up being: y=1/8x−5/8
I hope that helps you get moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)