8x + 7y = 19 - 8x 7y = 19 - 8x ÷ 7 y = 2 5/7 - 8/7x So if that line is perpendicular to the line you're looking for, then the gradient (x value/slope) is the negative reciprocal to the gradient you're looking for, which would then be 7/8. You are told it has a y intercept of -7, so your final answer is: y = -7/8x - 7 Hope this helps!
