Question

will medal and fan


Complete the equation for the linear function whose graph contains the point (7, 8) and has a slope of −1.2




y=___x+___

Answer 1

@phi

Answer 2

@shrutipande9 @undeadknight26

Answer 3

we need to use point slope form
y=mx+b
m=-1.2
so y=-1.2x+b
we want to find b now
if the point (7,8) is on this line then we have:
8=-1.2(7)+b
solve for b

Answer 4

can you find b?

Answer 5

0.4?

Answer 6

how?

Answer 7

show all the work

Answer 8

im lagging so it mite take a lil

Answer 9

no problem waiting here :)

Answer 10

well its hard to explain but thats what i got y=-1.2x+0.4

Answer 11

why is it hard to explain:
\[\large 8=-1.2\times7+b\]
\[\large 8=-8.4+b\]
\[\large b=8+8.4=16.4\]
i got a different answer!!

Answer 12

its just a simple linear equation?!

Answer 13

y=1.2x+-0.4

Answer 14

you subtract add and stuff like that

Answer 15

what did you do to get 0.4?

Answer 16

i just graphed mine it goes through (7,8)

Answer 17

no that's not the answer the slope is given to you
its -1.2=m
b=16.4 as i just did

Answer 18

the one you came up with does not go through (7,8)

Answer 19

both of ours do

Answer 20

im gonna go with yours your probably way better than me at math lol

Answer 21

why would you graph?
say that your answer is correct y=-1.2x+0.4
then if plugging 7 for x i should get 8 let's see if that's true
y=-1.2(7)+0.4=-8.4+0.4=-8

Answer 22

no yours is incorrect dear friend

Answer 23

(7,8) is not in your line that you did y=-1.2x+0.4

Answer 24

no i'm not
just make sure what you are doing is correct
how would you graph is you don't have the equation in the first place??
always follow common sense

Answer 25

if*

Answer 26

you can't graph something that you don't know its equation!!!

Answer 27

i'm lagging again darn hehe

Answer 28

ok thank you for your help

Answer 29

welcome!