use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation.
y=x^2+x+6

a. (0.5, -5.75)
b. (-0.5, 5.75)
c. (-0.5, 6)
d. (0.5, 5.75)

Melissa is purchasing a $160,000 home and her bank is offering her a 30-year mortgage at a 4.9% interest rate. in order to lower her monthly payment, melissa will make a 20% down payment and will purchase 3 points. what will her monthly mortgage payment be? a. $645.98 b. $650.46 c. $662.93 d. $606.69