Question

fan and medal
this is the equation f(x)=x^2-8x-84
the vertex (4,-100) axis of symmetery is 4
but how do I find three extra points to plot on the graph

Answer 1

well, is a quadratic, so it'd look like a bowl
so just pick one point to the left of the vertex
another point to the right of the vertex

and then you have the vertex, and draw the bowl
so you really just need two, but if you need a third one, sure :)

Answer 2

I would do that but I need to show how I found tit

Answer 3

*it

Answer 4

@pooja195 can you help please

Answer 5

how you found it? well, you have the equation :), just pick any random "x" value and get a "y" and that's a point :)

Answer 6

You're already getting help

Answer 7

if you factor the quadratic then you will have the 2 x-values for when y = 0

Answer 8

so would the other three points be (2,-112) and (1,-91)

Answer 9

@vera_ewing do you get this