Question

What is the axis of symmetry for the function? y = x2 + 3x - 4
y = -2
y = -1.5
x = -2
x = -1.5

Answer 1

use the same formula from the last post

Answer 2

tell me what you get

Answer 3

if you need it again, it is

x = -b/(2a)

Answer 4

okay just a sec.

Answer 5

alright

Answer 6

is a=2 or x

Answer 7

x^2 + 3x - 4 is the same as 1x^2 + 3x - 4

Answer 8

so in this case

a = 1, b = 3, c = -4

Answer 9

x=1.5

Answer 10

x = -b/(2a)

x = -3/(2*1) ... plug in a = 1 and b = 3

x = -3/2

x = -1.5

so you are off by a sign (lost the negative sign somewhere)

Answer 11

so it is -1.5, i thought i was suppose to change it to a possative?

Answer 12

no the axis of symmetry can be negative

Answer 13

it's not always positive

Answer 14

you might be thinking of absolute value?

Answer 15

o yea i am sorry okay thank you, i might need help later so look for my questions please:)

Answer 16

sure thing, glad to be of help

Answer 17

and don't be sorry, silly mistake