Variability refers to the Blank which Blank differ from each other.
1 answer:
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Answer:
see graph of y = 5x - 7
Step-by-step explanation:
If graphing is the task, you should rewrite the equation in a y = ax + b form. All straight lines can be described in this form, only the a and b determine which line it is.
Your equation 5x-y=7 has the 5x on the left side, so lets move it to the right. It will get a negative sign (this is the same as subtracting 5x like you did in your picture)
5x - y = 7
-y = 7 - 5x
Now we still have the -y which should be a +y. So we multiply left and right with -1 and get:
y = -7 + 5x
If we swap the -y and 5x (we can, because they are just an addition), we get:
y = 5x - 7
Now the equation is in its "normal" form. It's like the y = ax + b with a and b chosen as a=5 and b=-7.
The normal form is handy because you can immediately see the slope is 5 and the intersection with the y-axis is at y=-7.
(x - 4)² = 25
x - 4 =
√25
x - 4 = 5
x = 5 + 4 or x = -5 + 4
x = 9 or x = -1
Method Use : Completing the square
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Answer: x = 9 or x = -1
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x - 4 =
x - 4 =
x = 5 + 4 or x = -5 + 4
x = 9 or x = -1
Method Use : Completing the square
-------------------------------
Answer: x = 9 or x = -1
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