The anwer given in the book is 7. I know the formula (d= abs. value of Ax+By+C divided by the squ. rt. of Asquared+Bsquared), but for the life of me I'm just not getting seven. What am I doing wrong?
2006-07-14 11:20:44 · 10 answers · asked by buttercup1137 2 in Science & Mathematics ➔ Mathematics
PS, what is "y" in this situation in the equation of the line? That's where I'm messing up.
2006-07-14 11:24:07 · update #1
Just think about what this graph looks like.
x + 1 = 0, so x = -1
x = -1 is a vertical line. The point on x = -1 that is closest to the point (6,2) will have the same y-value as your given point
So the point closest to (6,2) that lies on the line x = -1 is
(-1,2)
The distance between (6,2) and (-1,2) is just the distance between the x-values (because the y-values are the same).
6 - (-1) = 7.
You do not need to use the formula.
Note: The coefficient of y is zero because there is no y term.
2006-07-14 11:25:55 · answer #1 · answered by MsMath 7 · 1⤊ 0⤋
you need to explain this problem better.
please write the problem instructions verbatim.
EDIT:
ok, distance formula.
x + 1 = 0 implies that x ALWAYS = -1, right.
so the distance between x = -1 and (6,2) [where x = 6, right?] is 6 - (-1) = 7.
You can ignore the y terms, since the shortest distance between a point and a line is the perpendicular which joins them. In this case, the perpendicular will be y = 2, and in the distance formula, the y terms will cancel.
2006-07-14 11:25:36 · answer #2 · answered by jimvalentinojr 6 · 0⤊ 0⤋
your question is really confusing because you're not giving us some information somewhere, but I will try and explain what "y" means in a linear equation
the basic linear equation is represented as follows:
y = 2x + 3
where x is the slope of the line and y is equal to the place where the line crosses the y-axis, or the y-intercept. In the example above the line would cross the y-axis at 3.
2006-07-14 11:30:38 · answer #3 · answered by Mike F 3 · 0⤊ 0⤋
7 is the distance between the point (6,2) and the line x+1=0
2006-07-14 16:20:21 · answer #4 · answered by Subhash G 2 · 0⤊ 0⤋
Wait, is this your homework? Just kidding.
I would sugguest writing the whole formula down, with the variables filled in, and redo it. Remember also:
-Always read over the question carefully
-Don't work to get it done, work to understand it
-If you don't understand, look at the question from a different perspective.
-If you are frustrated, take a break, then come back to it later with fresh eyes
-Work in a comfortable space, as it may help you think clearer
-Never hesitate to ask for help
Good Luck!
2006-07-14 11:34:35 · answer #5 · answered by Anonymous · 0⤊ 0⤋
y is the 0 in your equation
2006-07-14 11:25:50 · answer #6 · answered by JB 3 · 0⤊ 0⤋
look, its all about derivatives, ive said it once ill say it again, you take the derivative, set it equal to zero, and solve...that oughta get you started in the right direction.
2006-07-14 13:59:07 · answer #7 · answered by Anonymous · 0⤊ 0⤋
l6 +0+1l
-----------
sqrt(1+0)
equals 7/1 =7
2006-07-14 11:24:29 · answer #8 · answered by KateG 2 · 0⤊ 0⤋
restate your question. it doesnt make sense.
2006-07-14 11:25:12 · answer #9 · answered by got_deam_munalla 3 · 0⤊ 0⤋
Wut the hell are u looking for??? You gave us only the point and the equation, wut do u want to find out??? no one's gonna be able to answer it if we dont know wut u're looking for
2006-07-14 11:26:28 · answer #10 · answered by Night Owl 3 · 0⤊ 0⤋