f(x) = x^2 + 2x

a) Graph each quadratic function by determining whether its graph opens up or down and by finding the vertex, axis of symmetry, y-intercept, x-intercepts, if any.
b) Determine the domain and range of the function.
c) Determine where the function is increasing and where it is decreasing.

Question

f(x) = x^2 + 2x

a)	Graph each quadratic function by determining whether its graph opens up or down and by finding the vertex, axis of symmetry, y-intercept, x-intercepts, if any. 
b)	Determine the domain and range of the function.
c)	Determine where the function is increasing and where it is decreasing.

anonymous · Answer

http://tutorial.math.lamar.edu/Classes/Alg/Parabolas.aspx a) opens up, vertex: (-1, -1), axis of symmetry at x=-1... you can find the intercepts by solving for zero for each variable b) domain (all values of x) range ( y is equal to or greater than -1) c) find the derivative and see where the values would go from positive to negative (but if you look at the graph you could see it there)

anonymous · Answer

thank you so much!!

anonymous · Answer

no problem. and that website i attached has a ton of good stuff. im only on here since it doesn't give answers to specific questions :P have a good night