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Mathematics 19 Online
OpenStudy (horsegirl27):

medal and fan please help!!!!!! :)

OpenStudy (horsegirl27):

http://prntscr.com/6u9gk8 I think that it's A

OpenStudy (horsegirl27):

please explain if I'm right or wrong, I just subtracted to get .38, idk if that's how I do this

OpenStudy (amorfide):

you are correct in your answer I can explain how to do it if you wish

OpenStudy (horsegirl27):

Yes, please explain :)

OpenStudy (horsegirl27):

And then please help with another :)

OpenStudy (amorfide):

okay so you want the common difference, or ratio between each set of two points this means you want the gradient of a line that goes through point (1,24), and (2,24.38) then you want the gradient of a line going through the point (2,24.38), (3,24.76) then you want the gradient of a line going through the point (3,24.76), ( 4,25.14) so if you think of a standard set of two coordinates, to be labelled \[(x_{1},y_{1}), (x_{2},y_{2})\] then you would use the formula for the gradient of a line going through two points \[m=\frac{ y_{2}-y_{1} }{ x_{2}-x_{1} }\] where m is the gradient

OpenStudy (horsegirl27):

ok, thanks

OpenStudy (horsegirl27):

http://prntscr.com/6u9ic4 Am I right?

OpenStudy (amorfide):

each time the bottom of the fraction is going to be 1, in this question so you just had to subtract the y values

OpenStudy (horsegirl27):

Alright. That's what I did!

OpenStudy (amorfide):

arithmetic yes

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