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zepelin [54]
3 years ago
10

Is y = 2x - 3 a function

Mathematics
1 answer:
Lostsunrise [7]3 years ago
7 0

Answer: Yes it is a function.

Step-by-step explanation: When trying to find out, you put it into a calculator and can tell by the line if it is a function.

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What is the value of y circle the correct answer 62y = 434<br><br> 1.<br> Y=7<br><br> 2.<br> Y=5
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2 years ago
Work out the gradient of the line joining the points (2, 3) and (5,7)
Debora [2.8K]

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The gradient of the line joining the points P(x,y) = (2,3) and Q(x,y) = (5,7) is \frac{4}{3}.

Step-by-step explanation:

The gradient of the line joining two distinct point on a plane is represented by the slope of a secant line (m_{PQ}), that is:

m_{PQ} = \frac{y_{Q}-y_{P}}{x_{Q}-x_{P}} (1)

If we know that P(x,y) = (2,3) and Q(x,y) = (5,7), then the gradient of the line is:

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m_{PQ} = \frac{4}{3}

The gradient of the line joining the points P(x,y) = (2,3) and Q(x,y) = (5,7) is \frac{4}{3}.

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3 years ago
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