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soldi70 [24.7K]
3 years ago
8

(-1,19) and (3, 35)

Mathematics
1 answer:
natka813 [3]3 years ago
4 0

Answer:

\displaystyle \boxed{-4x + y = 23}

Step-by-step explanation:

First, find the <em>rate of</em><em> </em><em>change</em><em> </em>[<em>slope</em>]:

\displaystyle \frac{-y_1 + y_2}{-x_1 + x_2}

\displaystyle \frac{-19 + 35}{1 + 3} = \frac{16}{4} = 4

Then, plug these coordinates into the <em>Slope-Intercept Formula</em> instead of the <em>Point-Slope Formula</em> because you get it done much swiftly. It does not matter which ordered pair you choose:

35 = 4[3] + b

12

\displaystyle 23 = b \\ \\ y = 4x + 23

Then convert to <em>Standard</em><em> </em><em>Form</em>:

y = 4x + 23

- 4x - 4x

__________

\displaystyle -4x + y = 23

_______________________________________________

19 = 4[−1] + b

−4

\displaystyle 23 = b \\ \\ y = 4x + 23

Then convert to <em>Standard Form</em>:

y = 4x + 23

- 4x - 4x

__________

\displaystyle -4x + y = 23

** You see? I told you it did not matter which ordered pair you choose because you will ALWAYS get the exact same result.

I am joyous to assist you anytime.

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