Question

Which equation has this graph? (attached)
y = x2 + 5x + 8
y = x2 - 5x + 8
y = -x2 - 5x - 8
y = -x2 + 5x - 8

Answer 1

none of those choices... the y-intercept in the graph is 5

Answer 2

It has to be one of them. Its the only choices it has.

Answer 3

i might have put the wrong file. sorry

Answer 4

by noticing the y-intercept of the graph and your equations, you can eliminate two of 'em ... which two can you eliminate?

Answer 5

I dont know. Im not good at these. the last two?

Answer 6

yes... you can eliminate the last two...
so now it's only either the first or second.

Answer 7

first?

Answer 8

wait, a minute... are sure this is the correct graph again?

Answer 9

yes.

Answer 10

ok... my bad... i was looking at the first one again this time...

Answer 11

notice the vertex in your graph has a positive x-coordinate.

Answer 12

the x-coordinate of any quadratic equation is -b/(2a)
plug those a and b values into this expression and determine which one gives you a positive value... and that choic will be your answer

Answer 13

the x-coordinate of the vertex of any *****

Answer 14

I say its the 1st one?

Answer 15

these never made sense. but im going with the first one because i think thats it. is it?

Answer 16

i say it's the second one...