Asked by Addy

Which equation in point-slope form gives the plant's height at any time. (x,y) (3,21) (5,35) (7,49) (9,63)
Please Help!
Answered by Steve
assuming that the slope is constant (you should check), m = (35-21)/(5-3) = 14/2 = 7
So, pick any point, say (3,21) you get

y-21 = 7(x-3)
Answered by Addy
What about y= - 2/3 x + 7 in standard form using integers
Answered by Steve
Huh? Did you listen to yourself?
Not even close!

y-21 = 7(x-3)
y-21 = 7x-21
y = 7x

And besides, they asked for point-slope form.
Answered by Addy
bro ummm I was asking you that was a different question.........

write y-21 = 7(x-3) in standard form using integers
Answered by Steve
Well, first you need to note that Standard Form is
Ax+By = C
So,

y-21 = 7(x-3)
y=7x
7x - y = 0

y= - 2/3 x + 7
3y = -2x + 21
2x + 3y = 21
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