Question

If g(3) = 18, then g(x) = 2x + _____?

is this the same??

Answer 1

12

Answer 2

how did u get that?

Answer 3

g(3) = 18 means that the point (3,18) is on the line

Answer 4

and the g(x) is already in slope intercept form, so all you need to do is find the y intercept

Answer 5

im still so confused :/

Answer 6

you know y = mx + b?

Answer 7

yes been forever since i done y intercept but yes i know

Answer 8

g(x) is the same as f(x) is the same as y as far as notation goes don't let it confuse you

Answer 9

we know a point because g(3) = 18 means that (3,18) is on the line

Answer 10

and we have most of the equation already with the y = 2x + b
(b means blank)

Answer 11

so just plug in the (x=3, y=18) in y = 2x + b and solve for b

Answer 12

can you do that?

Answer 13

sorry i was writing it down so ur basically putting it in y intercept form?

Answer 14

it already was

Answer 15

18y=2(3)=-----

Answer 16

+----
sorry im horrible at math

Answer 17

thats almost it... but you replaced the y with 18, so the y went away

18 = 2(3) + b

Answer 18

so be 18-6?

Answer 19

yes

Answer 20

thanks :)