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3 years ago

I need all the help I can get please????

Mathematics

2 answers:

Lady bird [3.3K]3 years ago

4 0

Answer: OPTION D .

Step-by-step explanation:

1. By definition the function cut or intersects the y-axis when the value of x is equal 0 (x=0).

2. Therefore, you can observe the table given in the problem and see the value of y when x is equal to zero.

3. Keeping this on mind you can see that when x=0, y=8.

Therefore, you can conclude that the y-intercept in the table is 8.

4. As you can see in the graph, the y-intercept is at 5.

5. Then, since 5<8, the answer is the option D

insens350 [35]3 years ago

3 0

Answer:

Option D is correct

Step-by-step explanation:

The y-intercept is the point where the graph of a function crosses the y-axis. At this point, the x-coordinate is usually zero. Thus, the y-intercept of the function on the table is 8 while on the graph this value is 5.

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4 years ago

Read 2 more answers

I need help bruv. For the function y=x^2 - 5x - 6 .

lara [203]

Answer:

a. Vertex = (2.5,-12.25)

b. y-intercept = (0,-6)

c. x-intercept = (6,0) ; (-1,0)

Step-by-step explanation:

Your equation is written as:

$y = ax^{2} + bx +c$

The easiest way to find the vertex is writing the equation this way:

$y = a(x-h)^{2}+k$

Being the vertex (h,k)

So first complete the square

$y = x^{2} -5x -6 \\y = x^{2} - 2(2.5x) -6 \\y = x^{2} - 2(2.5x) +2.5^{2} - 2.5^{2} -6 \\y = (x^{2} -2(2.5x) + 2.5^{2}) -6.25 - 6 \\y = (x-2.5)^{2} -12.25$

Vertex : (2.5,-12.25)

To find the y-intercept you need to replace the equation when x = 0 and get y

$y = (0)^{2} - 5(0) -6\\y = - 6$

To find the x-intercept you need to replace the equation when y = 0 and get x

$0 = x^{2} - 5x -6 \\0 = (x-6)(x+1)\\x = 6\\x = -1$

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