Hi I’m dying over here over this question it’s looking for the value of y. It’s like a graph situation the equation is placed on one line that’s a diagonal. T(-3,y), P(6, -5), R(x,8) but there’s choices on the answer -18, -2, 15 please help if you could thank you 🥰

All we know is that the line through P also intersects y=8 and x = -3

As there are infinitely many lines through P, any of the y values could work, since you have placed no constraints on the value of x. I guess you will have to actually look at the graph and see what y is.