Not sure what the right answer is

9514 1404 393

  (b)  No, both are wrong

Step-by-step explanation:

Compare the given equation to the form ...

  y = mx + b

You see that m = 1/3, and b = -1.

b is the y-intercept, the point where the graph crosses the y-axis. In the equation, that value is -1. In the graph shown, that value is +1, so we know the y-intercept is wrong.

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m is the slope. This is the ratio of "rise" to "run". A slope of 1/3 means the graph goes up 1 unit for each 3 units to the right. The slope of the line on the graph shown is about 3: it rises 3 units for each 1 unit to the right. So, we know the slope is wrong.

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That is, both the slope and y-intercept of the graphed line are different from those of the given equation. Corey is not correct. The attachment shows a correct graph.

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify