The reflection is happening over the x axis (horizontal axis)

Any y coordinate that is positive turns negative, and vice versa

For example: (1,2) ---> (1,-2)

In general, the rule is (x,y) ---> (x,-y)

So the answer is choice C

8 0

3 years ago

Gina has 1200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed ar

Alekssandra [29.7K]

We know the perimeter formula would be 1200=2x+2y. And the area will be A=x*y
We can to take the derivative of the area formula to find where it is a max but we must first substitute something in from the first formula so we only have one variable.

1200-2x=2y
600-x=y

A=(x)*(600-x)
A=600x-x^2

Now we take the derivative:
A'=600-2x (set equal to 0 and solve)
0=600-2x
2x=600
x=300

Then when we plug this into the perimeter formula, we can solve for y
1200=2x+2y
1200=2(300)+2y
1200=600+2y
600=2y
y=300

So both the length and width are 300 yards, and the area would be 90,000 square yards

Hope this helps

8 0

3 years ago

Use the graph to write an equation that represents the relationship between X and Y.

Yuki888 [10]

Answer:

The equation is $y=x-3$