SOLUTION: Can someone please help me with this problem.
State whether the paraabola opens upward or downward.
f(x)=-x^2-18
Algebra.Com
Question 201859: Can someone please help me with this problem.
State whether the paraabola opens upward or downward.
f(x)=-x^2-18
Found 2 solutions by jim_thompson5910, RAY100:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Notice that the quadratic is in the form of where , , and
Recall that
if A > 0, then the parabola opens upward
if A < 0, then the parabola opens downward
Since , which is less than 0, this means that the parabola opens downward.
Here's a graph to prove it:
Graph of
Answer by RAY100(1637) (Show Source): You can put this solution on YOUR website!
f(x) =y= - x^2 -18
.
(y+18) =-1 x^2,,,,,,std form (y-k) =A (x-h)^2
.
vertex at ( 0,-18)
.
since A is negative, pointing down
.
double check,,graph on either side of vertex
.
x= 1,,,,y=-19
.
x=-1,,,,,y=-19,,,,,therefore pointing down
RELATED QUESTIONS
can someone please help me with these two problems:
State whether the parabola opens... (answered by checkley77)
Can someone please help me with this problem:
Determine whether the graph of each... (answered by Earlsdon)
Please help me solve this problem:
The following equation defines a parabola. Without... (answered by nerdybill)
please help me solve this: f(x)=1/2x^2-6....also need to know the minimum and maximum... (answered by ewatrrr)
determine the vertex of the given parabola and state whether it opens upward or downward.
(answered by rfer)
Determine whether the graph of the quadratic function f(x)=x^2+5 opens upward or... (answered by josgarithmetic)
can someone please help with this:
Compare the graph of the given quadratic function f (answered by tutorcecilia)
Determine the vertex of the parabola and state whether it opens upward or downward.... (answered by josgarithmetic)
Determine whether the graph of each parabola opens upward or downward.
y= -1/2^x^2+3
(answered by Earlsdon)