# college math

posted by .

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

• college math -

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

## Similar Questions

1. ### Algebra II

Does the graph of y = x – 3x2 + 5 have a maximum or minimum?
2. ### Algebra2

Complete parts a – c for each quadratic function. a. Find the y-intercept, the equation of the axis of symmetry and the x-coordinate of the vertex. b. Make a table of values that includes the vertex. c. Use this information to graph …
3. ### Algebra

Identify the vertex and the axis of symmetry for the graph of y=5(x-2)^2 + 3. a) vertex (2,3); x = -2 b) vertex (-2,-3); x = 2 c) vertex (2,3); x = 2 d) vertex (-2,-3); x = -2 I have no idea how to solve this problem! Please help. …
4. ### College Math

Find the vertex and axis of symmetry of the graph of a function. f(x)=x^2+6x+16
5. ### math

Complete the square to find the vertex of each quadratic function. State the vertex. (10 marks) A) f(x) = x2 + 8x – 3 B) f(x) = x2 – 5x + 8 C) f(x) = 2x2 – 12x + 1 D) f(x) = 3x2 + 2x – 5
6. ### College Algebra

1.Answer the following for the given quadratic function. f(x) = -2x^2 - 8x - 13 (a) does the graph of f open up or down?
7. ### algebra

Can someone please explain What polynomial has a graph that passes through the given points?
8. ### Algebra

What are the coordinates of the vertex of the graph of the function y = –3x² –12x + 3?
9. ### heelp math

A graph is constructed iteratively according to the following algorithm. The graph starts as a single vertex. With probability p, the graph stops here. Otherwise, 3 new vertices are constructed and joined to this vertex. If we have …
10. ### ITT

use the eight step strategy to graph f(x)=-3x2-12x-5 find the vertex find x and y intercepts determine the number of points to graph graph the parabola

More Similar Questions

Post a New Question