Question

Find the x and y intercept for each equation.

y = 4x – 1
Select one:
x = 0.25; y = -1
x = -1; y = 1.5
x = 1; y = 1
x = 2; y = 0.5

Find the x and y intercept for each equation.

y = 3x + 9
Select one:
x = 3; y = 5
x = 9; y = 6
x = -3; y = 9
x = -6; y = -3

Answer 1

a and c i guess

Answer 2

to solve for x-intercept, make y = 0
to solve for y-intercept make x = 0

Answer 3

y = 4x – 1
0 = 4x - 1
solve for x

Answer 4

y = 4x – 1
y = 4(0) - 1
solve for y

Answer 5

THanks :)

Answer 6

3

Answer 7

what is 3?

Answer 8

y = 4 - 1

Answer 9

okay that is y = 3
how about solving for x?

Answer 10

thats three too :O

Answer 11

but how did you get y = 4(0) - 1 = 3?
4 multiplied by zero is 4?

Answer 12

no its 0

Answer 13

@Yolo4mecuite 4 multiplied 0 is 0.. what happened man

Answer 14

so y is not equal to 3 then :)
solve it again

Answer 15

0.25

Answer 16

huh?

Answer 17

solve things ONE at a time
y = 4*0 - 1

Answer 18

-1

Answer 19

you need to make it an equation. just to say 1 does not make any sense

Answer 20

indicate y = -1

Answer 21

y=-1

Answer 22

sorry about that

Answer 23

now solve for x
y = 4x - 1
replace y with 0
0 = 4x - 1
solve for x

Answer 24

x = 0.25?

Answer 25

good job
or just put x = 1/4

Answer 26

Oh ok :)

Answer 27

do you now why we refer to them as the x-intercept and y-intercept?

Answer 28

No

Answer 29

Actually no, you can't just have 4x - 1 and solve for x..

You would subtract 4x to the left side to then isolate x,

Answer 30

you don't need to subtract 4x on both sides, one way to isolate also is to add 1 on both sides

Answer 31

Or add 1 :p yee

Answer 32

Thanks guys! :)

Answer 33

does it matter if the x is on the left or right side? no it does not.
1 = 4x
divide both sides by 4
1/4 = x
she is right
x = .25

Answer 34

Yea, my point was you can't have 4x -1 and solve for x.

Answer 35

I want to go back to my previous question, @Yolo4mecuite do you know why they are called the x-intercept and the y-intercept?

Answer 36

there has to be a "=" or inequality sign

Answer 37

No

Answer 38

you obviously aren't paying attention @tHe_FiZiCx99
here is what I typed
y = 4x - 1
replace y with 0
0 = 4x - 1
solve for x

Answer 39

there was not a time when the equality sign was not part of the solving process

Answer 40

I'm saying you can't solve for x if you have them next to each other. You would either add 1 or subtract 4x.