Use the graph to find the cost of 8 hats.

If you look at the graph, the x axis the the number of hats and y axis is the cost.

So 8 hats will cost $60

Answer

D. The cost of 8 hats is $60

The cost of 8 hats = $60.

Step-by-step explanation:

In the given graph , the x-axis is representing the number of hats and y-axis is representing the cost of hats ( in dollars $).

To find the cost of 8 hats , just look at the x-axis and search for point x=8 on it .

Then , draw a straight line vertically passing through x=8 or just look at the dot marked above x=8 on the graph.

Then check the y-value associated with that dot or draw a horizontal line from that point , you will get y= 60

It means, the cost of 8 hats = $60.00.

See attachment below.

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8