find the vertex and graph of y=.3x2+1.8x-2

Answer 1

y = 0.3 x^2 + 1.8 x - 2 ???

.3 x^2 + 1.8 x = y+2

x^2 + 6 x = (10/3)y + 20/3

x^2 + 6 x + 9 = (10/3) [y + 2/3 + 2.7/3]

(x+3)^2 = (10/3) [ y + 4.7 ]

(-3, -4.7) vertex
axis of symmetry is x = -3
upright, holds water