In google type:
functions graphs online
When you see list of results click on:
rechneronline.de/function-graphs/
When page be open in blue recatacangle type:
-x^2-8x-17
In Display properties set:
Range x-axis from -8 to 2
Range y-axis from -8 to 2
Then click option Draw
You will see graph of your function.
graph y=-x2-8x-17
2 answers
Your function have y-intercept
y= -17
For x=0
y= -x^2-8x-17= -0^2-8*0-17=0-0-17= -17
If you want to see graph with y-intercept in Display properties set:
Range x-axis from -8 to 2
Range y-axis from -18 to 2
y= -17
For x=0
y= -x^2-8x-17= -0^2-8*0-17=0-0-17= -17
If you want to see graph with y-intercept in Display properties set:
Range x-axis from -8 to 2
Range y-axis from -18 to 2