Ask your own question, for FREE!
Mathematics 18 Online
OpenStudy (anonymous):

Helpss

OpenStudy (anonymous):

OpenStudy (anonymous):

@johnweldon1993 last one i promise ;-;

OpenStudy (johnweldon1993):

When x goes up 1...what does f(x) go up by? x | y ------- -1| -5 0 | -1 x went up 1....y went up by how many?

OpenStudy (anonymous):

5?

OpenStudy (johnweldon1993):

Well to get from -5 to -1 we have to add 4 right?

OpenStudy (anonymous):

yes

OpenStudy (johnweldon1993):

Alright...so when x goes up by 1...y " or f(x) " goes up by 4....so that would be our slope in our equation f(x) = 4x but what is our y-intercept....well that occurs when x = 0.....what does 'y' equal when 'x' = 0 "hint look above :)

OpenStudy (anonymous):

-1

OpenStudy (johnweldon1993):

Right... so that is our equation for f(x) f(x) = 4x - 1 Make sense? Alright...now...we compare the slopes of f(x) and g(x)

OpenStudy (anonymous):

okay cx

OpenStudy (johnweldon1993):

Notice how both f(x) and g(x) are both in slope intercept form y = mx + b 'm' there is the slope...and 'b' is the y-intercept...that means \(\large f(x) = 4x - 1\) the 4 would be our slope and the -1 would be the y-intercept \(\large g(x) = 4x + 3\) the 4 would be the slope again...but the 'y' intercept will be 3

OpenStudy (johnweldon1993):

So to "compare" the slopes....they are the same :)

OpenStudy (johnweldon1993):

And part B) which has a greater 'y' intercept? well f(x) has -1 and g(x) has 3 so obviously.... ( ) has the bigger one ^ fill that in :P

OpenStudy (anonymous):

so i could put f(x)=4x−1 the 4 would be our slope and the -1 would be the y-intercept g(x)=4x+3 the 4 would be the slope again...but the 'y' intercept will be 3, they are the same

OpenStudy (anonymous):

g(x)

OpenStudy (johnweldon1993):

well for part A ...dont mention the y-intercepts yet...thats not needed until part B For part B ....write the equations again but only say the y-intercepts not the slopes :)

OpenStudy (anonymous):

im a bit confused, but im also listening to the comedy radio again, so im not focused XD

OpenStudy (johnweldon1993):

Lol oh god no turn it off XD A) f(x) = 4x - 1 slope = 4 g(x) = 4x + 3 slope = 4 They have the same slope B) f(x) = 4x - 1 y-intercept = -1 g(x) = 4x + 3 y-intercept = 3 g(x) has the greater y-intercept

OpenStudy (anonymous):

i already had it, you didnt have to do it, i just had to re read it XD

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!