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3 years ago

I have been doing math all day, please help!

Mathematics

2 answers:

Murljashka [212]3 years ago

5 0

Y=-3x+4 is the correct answer

Darya [45]3 years ago

3 0

Answer:

y = -3x + 4

Step-by-step explanation: Substitute the numbers in for x & y to see which one is the answer.

(-1, 7):

y = -3x + 4

7 = -3(-1) + 4

7 = 3 + 4

7 = 7

TRUE

y = 2x - 9

7 = 2(-1) - 9

7 = -2 - 9

7 = -11

FALSE

y = 5x - 2

7 = 5(-1) - 2

7 = -5 - 2

7 = -10

FALSE

y = -3x + 7

7 = -3(-1) + 7

7 = 3 + 7

7 = 10

FALSE

Hope this helps you!!! :)

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See attachment for graph

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Given

$f(x) = \left[\begin{array}{cc}-1&x1\end{array}\right$

Required

The graph of the step function

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$\le$ and $\ge$ use closed circle at its end

and $>$ use open circle at its end

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<em>See attachment for graph</em>

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