Question

Graphs

Answer 1

which do you think?

Answer 2

D :s

Answer 3

yep that's correct. do you know why?

Answer 4

no can you explain for me

Answer 5

oops I'm wrong, I mean answer is supposed to be B.

best way to see which graph match is to check whether it opens upward or downward.

roots is also key here. you are given \(x^2 + 2x - 8\), which can be factor to \((x-2)(x+4)\) so we know roots are -4 and 2.

so this curve should goes through (-4,0) and (2,0)

is that clear?

Answer 6

Yes Thank you! i have one more graph ques

Answer 7

sure