Is r = -92 a linear, quadratic or exponential relationship between x and y? Is the slope of the graph negative or positive?

The equation r = -92 does not represent a relationship between x and y. It is simply an equation relating the variable r to a constant value of -92.

Hence, there is no linear, quadratic, or exponential relationship between x and y in this case. Therefore, it is not possible to determine the slope of the graph.