How would you find the domain and range with the graph of a quadratic function ?

Question

anonymous · Answer

domain represents the values of x

anonymous · Answer

and range the values of y

campbell_st · Answer

well the domain of the quadratic will be all real x, unless there is a restriction defined in the question

for the range you need to find the minimum value or maximum value the parabola gets to. 

the easy way to do this is to find the vertex of the parabola, the y value in the vertex is the max or min value... 

so if a max    y =< max value      min  y >=  min value

hope it helps

anonymous · Answer

|dw:1412485419769:dw|
Sorry for the bad drawing lol. So ,the vertex is (-2,-6).The minimum value is -6 .The range would be $$Y \le-6$$