Algebra HELP!!
posted by Margie
Write the equation of the line that contains the points (2, 2) and (3, 12).
Here is part of the answer. Can you identify the missing part?
y = 2x + ___
I think it's 12
You've got the slope so use
yy1=m(xx1) where (x1,y1) is either point.
If you use (2,2), then y2=2(x2)
I don't think it's 12, but verify this yourself.
I don't understand!Can you explain it better please?
I don't get it either!!
This is not a very good format for teaching, it's designed for helping. You both need to learn the basic formulas and concepts.
Slope is the change in y over x as you move along a line. The y intercept is where the line crosses the yaxis.
In the formula y=mx+b m is slope and b is the intercept.
If you're given a point and the slope you use the point slope form of the line which is
yy1 = m(xx1) where (x1,y1) is the given point and m is the slope; x and y are simply variables.
Another way to answer the question
Write the equation of the line that contains the points (2, 2) and (3, 12).
Here is part of the answer. Can you identify the missing part?
y = 2x + ??
would be to substitute either point and solve for the ?? as
2= 2*2 + ?? or 6=?? so the intercept is 6.
oh so the answer is......y=2x+6???
I think that's it?Or am I suppposed to multiply!!
Yes, that's the correct answer. Test it to be sure.
sure
what is the answer for this (1,1), slope = 2
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