What is the image of (8,-9) after a reflection over the x-axis?

plain and short, after a reflection over the x-axis, the y-coordinate changes sign, so -9 turns to +9, (8, 9).

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.