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saul85 [17]
3 years ago
14

3) The graph of the equation y = x2 + 1 is shown. Which equation will shift the graph up 7 units? A) y = x2 + 7 B) y = x2 - 8 C)

y = x2 + 8 D) y = (x+7)2
Mathematics
2 answers:
Elina [12.6K]3 years ago
6 0
Your answer is C. (1+7=8)
Anna71 [15]3 years ago
3 0

Answer:

C) y=x^2+8

Step-by-step explanation:

the function

y=x^2+1

Is a parabola that crosses the y-axis at +1.

So in a function of the form:  y=x^2+a, the number a indicates the point at which the graph of the function crosses the y-axis.

So, to find a function that is 7 units above, we need to add 7 to the number a.

In this case a = + 1

so adding 7:

+ 1 + 7 = + 8

So the resulting function, which is 7 units above is:

y=x^2+8

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Answer:

Base on the vertex (h, k) and the distance p between vertex and directrix, the standard form of parabola is written as:

(x – h)^2 = 4*p(y – k)

We have (-1, -5) as vertex.

=> (x + 1)^2 = 4*p(y + 5)

Now, we find p:

The distance between (-1, -5) and x = -7 is calculated by:

|-1 -(-7)| = |6| = 6

=> (x + 1)^2 = 4*6(y + 5)

=> (x + 1)^2 = 24(y + 5)

Hope this helps!

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Your answer is:

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