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heyitslizzy13
 one year ago
can anyone help with with parts b, c, and d please?(:
heyitslizzy13
 one year ago
can anyone help with with parts b, c, and d please?(:

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phi
 one year ago
Best ResponseYou've already chosen the best response.1part b wants you to find the equation of a line. Its first point is at x=0 what is the y value when x is 0?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes, so the first point is (0,995) you now want the point at x=8. you can read it off the graph what is it ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1now we have two poins (0,995) and (8,1464) the starting point is the equation y= m x + b we need to find m. m is the slope, and slope is change in y divided by change in x can you find the slope between these two points?

phi
 one year ago
Best ResponseYou've already chosen the best response.1change in y is 1464995 = ?

heyitslizzy13
 one year ago
Best ResponseYou've already chosen the best response.1yes okay I got 469/8 for the slope :)

phi
 one year ago
Best ResponseYou've already chosen the best response.1ok, now use the first point (0,995) y = (469/8) x + b replace y with 995 and x with 0 what do you get ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. (we could have use the other point and we would get the same answer for b... but it would be harder arithmetic) anyways, y= (469/8) x + 995

heyitslizzy13
 one year ago
Best ResponseYou've already chosen the best response.1wow, okay thanks :)) can you explain part c to me please?

phi
 one year ago
Best ResponseYou've already chosen the best response.1the slope of that line is the average "change in sales" per year from 2000 to 2008

heyitslizzy13
 one year ago
Best ResponseYou've already chosen the best response.1i'm not sure how to

phi
 one year ago
Best ResponseYou've already chosen the best response.1they want you to find y using your equation what x value should we use to get 2010 ? any idea ?

heyitslizzy13
 one year ago
Best ResponseYou've already chosen the best response.1so just plug it into the equation and get my answer?(:

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. I would change the slope to a decimal, multiply by 10 then add 995 then round to the nearest whole number.

heyitslizzy13
 one year ago
Best ResponseYou've already chosen the best response.1$1581.25 million

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. and because all the other numbers in the graph are whole numbers it makes sense to round to 1581. (you can make a note that you rounded it, in case your teacher wonders) I would say it is a reasonable estimate because the graph of the points is roughly a straight line (the dots are not scattered all over the place) and we are only estimating 2 years into the future. (it would be less reasonable to estimate say 20 years into the future)
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