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Dmitrij [34]
2 years ago
12

Draw the graph of y=2x – 1 for values of x from -2 to 3.

Mathematics
1 answer:
miss Akunina [59]2 years ago
7 0

Answer:

x=-2 y= -5

x=-1 y=-3

x=0 y=-1

x=1 y=1

x=2 y=3

x=3 y=5

Step-by-step explanation:

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Find c such that (−3,−8), (−7,−6), and (c,4) lie on a line.
Nutka1998 [239]
If the 3 points are collinear, then the slopes of all line segments connecting the points are the same.

Thus, 

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m = ------------- = -------- = -1/2
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Then the following must be true:

             4-(-6)          10
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             c - (-7)       c + 7

Cross multiplying, -(c+7) = 20, and c+7 = -20, so that c = -27
8 0
3 years ago
On the following number line, point C represents the integer -1. Identify the integer that each of the other letters represent.
ivolga24 [154]

Answer:

If point C represents -1, then each space is 1 unit.

So, A = -10

B = -4

D=2

E=9

Let me know if this helps!

3 0
2 years ago
What is the mean median and mode of 99, 69, 96, 69, 78. Round to the nearest tenth if necessary
KiRa [710]
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To find it put the numbers in order.
78, 69, 69, 96, 99
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78, 69, *69,* 96, 99

The median is 69

A mode is the number that appears the most in a set of numbers.
78, *69, 69,* 96, 99

The mode is 69

To find the mean or average of a set of numbers, add all the numbers together then divide by the number of numbers there are.
99+69+96+69+78 = 411
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The mean is 82.2

Hope this helped! If you have anymore questions or don't understand, please comment on my profile or DM me. :)
6 0
2 years ago
Consider the parabola represented by the equation -2y^2=4x
stepan [7]
Part 1: The general form for this matches y^2 = -4cx, which implies that this opens to the left. (Imagine assigning any value of y, whether positive or negative, which would result in a positive left-hand value. Then to match this sign, the value of x must be negative so that the right-hand side becomes positive as well.)

Part 2: The distance from the vertex to the directrix is given by c. This equation has its vertex at the origin (0, 0). If it opens to the left, the directrix is a vertical line to the right of the origin. This equation is y^2 = -4(1/2)x, so c = 1/2, and the directrix has the equation x = 1/2.

Part 3: The focus is inside the parabola, but it is the same distance from the vertex as the directrix. This distance is 1/2 units, and it will be to the left of the vertex. So the focus is at (-1/2, 0).
5 0
2 years ago
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4 0
2 years ago
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