Posted by **cindy** on Sunday, March 7, 2010 at 8:21pm.

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

- college math -
**Damon**, Sunday, March 7, 2010 at 8:31pm
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

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