How can you tell when an equation in one variable has only one solution

If your annual gross income is $62,000 and you have one monthly car payment of $335 and a monthly student loan payment of $225, what is the maximum house payment you can afford. consider a standard 28% front-end ratio and a 36% back-end ratio. also, to complete your calculation, the annual property tax will be $3,600 and the annual homeowner's premium will be $360.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Graph the linear function using the slooe and y intercept