Answer: D
Step by Step: Even though the y value repeats, to be considered not a function is when the X value repeats
Y^2 my teach taught me this last year
(x - 7)(y - 9)
x*(y - 9) - 7*(y - 9)
x*y - x*9 - 7*y -7*(-9)
xy - 9x - 7y + 63
That's the product.
The only right triangle that has an angle with a tangent of 1 is a 45-45-90 right triangle.
Do c=b meaning that you need to number that multiply to c but the sum of those numbers give u the value of b. The answer would be (x+3)(x+1) because both are positive.