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Zina [86]
3 years ago
5

Which translation maps the vertex of the graph of the function f(x) = x2 onto the vertex of the function a(x) = x2 - 10x +2?

Mathematics
1 answer:
zysi [14]3 years ago
8 0

Answer:

5 units to right and 23 units down

Step-by-step explanation:

The vertex of f(x)=x^{2} is at (0,0).

In order to find the vertex of function a(x), we convert the function a(x) to vertex form.

The general vertex form is y=a(x-h)^{2} +k.

Here, (h,k) is the vertex.

a(x)=x^{2} -10x+2\\ a(x)=(x-5)^{2}-25+2=(x-5)^{2}-23

So, the vertex of the graph of a(x) is at (5,-23) and the vertex of f(x) is at (0,0).

Therefore, in order to translate (0,0) to (5,-23), we have to move the vertex of f(x) 5 units to right and then 23 units down.

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A linear function has an x-intercept of 12 and a slope of 3/8. How does this
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Answer:

O It has the same slope and a different y-intercept.

Step-by-step explanation:

y = mx + b

m = 3/8

b = 12

y = (3/8)x + 12

---

Data in the table:  slope is the rise (y) over the run (x) between two points (assuming the data represent a linear line).

 Change in x and y between two points.  I'll choose (-2/3,-3/4) and (1/3,-3/8).

Change in y:  (-3/8 - (-3/4)) = (-3/8 - (-6/8))  =  3/8

Change in x:  (1/3 - (-2/3)) = (1/3+2/3) = 3/3 = 1

Slope = (Change in y)/(Change in x) = (3/8)/1 = 3/8

The slope of the equation is the same as the data in the table.

Now let's determine if the y-intercept is also the same (12).  The equation for the data table is y = (2/3)x + b, and we want to find b.  Enter any of the data points for x and y and then solve for b.  I'll use (-2/3, -3/4)

y = (3/8)x + b

Use (-2/3, -3/4)

-3/4 =- (3/8)(-2/3) + b

-3/4 = (-6/24) + b

b = -(3/4) + (6/24)

b = -(9/12) + (3/12)

b = -(6/12)

b = -(1/2)

The equation of the line formed by the data table is y = (3/8)x -(1/2)

Therefore, It has the same slope and a different y-intercept.

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2 years ago
What is the x-intercept for the equation -2x + 5y = -10
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Answer:

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Step-by-step explanation:

-2x + 5y = -10

At the x intercept y = 0 so we substitute y = 0 into the given equation:

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-2x = -10

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