The quadratic function having narrowest graph is y=-[tex]4x^{2}[/tex].
What is quadratic function?
The function which have highest power 2 of the variable x or anything like [tex]x^{2} -s x +p=0[/tex].
How to plot graph of a function?
To plot a function we need to put the value of x and the value of function comes and we have to plot these points on the graph to get the graph of a function.
1)y=-2[tex]x^{2}[/tex]
Points (1,-2) and (2,-8)
2) y=-1/2[tex]x^{2}[/tex]
points (1,-0.5) and (-1,-0.5)
3) y=-4[tex]x^{2}[/tex]
points (1,-4) and ( 2, -16)
4)y=1/7[tex]x^{2}[/tex]
points (1,0.1) and (-1,0.1)
By plotting these points we get the following graphs and it can be concluded that the narrowest graph is y=-4[tex]x^{2}[/tex].
Learn more about graphs at https://brainly.com/question/4025726
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