to find the slope you use the equation y2-y1/x2-x1. It doesn’t matter which y you choose for y2 as long as you choose the x from that same pair for x2.
I chose -2 for y2 so after plugging in the numbers my equation looked like -2-3/-5+3. This equals -5/-2 which simplifies to 5/2
If x is the total number of bass in the lake we can write the following proportion: 176 / x = 13 / 91. 13 / 91 simplifies to 1 / 7 so the proportion becomes 176 / x = 1 / 7. Using the Cross Products Property this becomes x = 1232.