Question

Functions help.

Answer 1

@Lena772, the slope of g(x) is already given, right?

Answer 2

And to find the slope of f(x), we just need to take two points and apply the slope formula

\(m = \dfrac{y_2 - y_1}{x_2 - x_1}\)

Answer 3

PART A:
f(x): -5 - - 1 = -4
-1 - 0 = -1

f(x): 4

g(x): mx + b = y; m is the slope therefore in the g(x) equation 4 is the slope.

Both functions have the same slope of 4.

PART B:
f(x):
y - y1 = m (x-x1)
y- (-5) = 4(x - (-1))
y + 5 = 4x + 4
- -5
y= 4x - 1

g(x)= 4x + 3, thus accordingly with the formula mx+b, b being the y-intecept. The y intercept of this function is 3.

g(x) has a greater y-intercept than f(x).

Is that what they're asking for?

Answer 4

but i dont think you calculated the slope right for f(x)

Answer 5

cuz i got -6

Answer 6

where

Answer 7

You mean here : y + 5 = 4x + 4
- 5 -5 ?

Answer 8

PART A:

The slope of g(x)=4. (given)

m=y2-y1/x2-x1

f(x)=y
-1-5/0--1
-6/1

m=-6

The slope of f(x)=-6

PART B:

The y intercept of g(x) is 3. (given)

f(x)=-6x+b
-5=-6*-1+b
-5=6+b
-11=b

The y intercept of g is bigger.

Answer 9

O.o ohh you mean cus its negative?

Answer 10

no I mean because when I calculate the slope of f(x) i don't get 4

Answer 11

xD -5- (-1)
negative and negative is positive

Answer 12

\((x_1, y_1) = (0,-1)\)
\((x_2, y_2) = (-1,-5)\)
\[m = \frac{y_2 - y_1}{x_2 - x_1}\]
\(m = \dfrac{-5 - (-1)}{-1 - 0} = \dfrac{-5 + 1}{-1} =\dfrac{-4}{-1} = 4 \)

Answer 13

Ty @Hero

Answer 14

Lol thanks!

Answer 15

Yw :3

Answer 16

@Lena772 have you seen the Khan Academy videos?

Answer 17

There's a help site in the announcement page, there's links to Khan and help sheets :D

Answer 18

I've seen a few actually. I find them to be a waste of time. The guy just rambles. I rather get help on OS

Answer 19

*storms out w/o medals* >.<'

Answer 20

He tries to teach more for understanding than learning, but if you stay with his program you will get great results.

Answer 21

Yeaa, the point is to clarify doubts/how to's not to learn an entire lesson though