Using the diagram of the reflection below, what would be the slope for the line of reflection? I

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.