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Mathematics 8 Online
OpenStudy (anonymous):

Algebra 2... Help me :(

OpenStudy (anonymous):

Question: http://prntscr.com/66xprn

OpenStudy (anonymous):

Any clue?

OpenStudy (anonymous):

alright so rate of change is the same thing as asking for slope

OpenStudy (anonymous):

do you remember the equation for slope?

OpenStudy (anonymous):

Mk.

OpenStudy (anonymous):

y = mx + b?

OpenStudy (anonymous):

that's the equation for a line. m is the slope so m=?

OpenStudy (anonymous):

um... lost right now

OpenStudy (anonymous):

Remind me please?

OpenStudy (anonymous):

so we are asked to find the average rate of change for this function from x=-1 to x=2

OpenStudy (anonymous):

Alright (btw, I don't have much time left... just a heads up)

OpenStudy (anonymous):

alright since I want to help you get it done and learn

OpenStudy (anonymous):

\[m=\frac{ y_{2}-y_{1} }{ x_{2}- x_{1} }\]

OpenStudy (anonymous):

we can look at the graph since we are given our x to find our y values

OpenStudy (anonymous):

Can you plug in the values and show me how to solve briefly?

OpenStudy (anonymous):

\[m=\frac{ 4-0 }{ -1-2 }\]

OpenStudy (anonymous):

m=-4/3

OpenStudy (anonymous):

whoa whoa.. where did 4 come from?

OpenStudy (anonymous):

(when you solved above)

OpenStudy (anonymous):

nvm

OpenStudy (anonymous):

Thanks.

OpenStudy (anonymous):

(still didn't partially get it...)

OpenStudy (anonymous):

what part are you unsure about?

OpenStudy (anonymous):

the 4

OpenStudy (anonymous):

when you solved

OpenStudy (anonymous):

you look at the graph for it we are told x=-1

OpenStudy (anonymous):

we look at x=-1 and then travel up until we hit the line and when x=-1 the line crosses 4 so we have the point (-1,4)

OpenStudy (anonymous):

Alright... thanks man. Can you tel me what "y^2" and the other 3 stand for? it'll help me a lot in the future.

OpenStudy (anonymous):

My last request, sorry about that.

OpenStudy (anonymous):

its not y^2 it's y2 because you are given two points and you are given two point (-1,4) and (2,0). Pick one as point 2 and then plug in it's y value minus the y value of the first point and over it's x value minus the other point's x value

OpenStudy (anonymous):

thanks a lot, god bless ya!

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