Which of the following equations describes the graph? a. y = -3×^2 + 4b. y = 3×^2 + 4c. y = 3×^2 - 4d. y = -3×^2 - 4

C. y = 3×^2 - 4

Step-by-step explanation:

Remember that to evaluate a graph when you have options you just ahve to calculate the Y and x intersect, so the grap will intersect with the Y axis when x=0, evaluate Y=3x^2-4 when x=0

y=3(0)^2-4

y=-4

So the graph will touch y when it is at -4. That makes this ecuation the correct for the graph given.

Remember too that when the sign of x is negative the grph grows downward, since this is growing upward the sign of X should be positive.

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)