Use the substitution method to find the slope and y-intercept.

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02-03-2022
Mathematics

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Use the substitution method to find the slope and y-intercept.

Sagot :

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ij04478 ij04478 · Answer 1 · 2022-03-02T18:39:29-05:00

ij04478 ij04478

02-03-2022

Answer:

y=4x+7

Step-by-step explanation:

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sqdancefan sqdancefan · Answer 2 · 2022-03-02T18:43:27-05:00

Answer:

slope: 4
y-intercept: 7

Step-by-step explanation:

Substituting the given table values into the desired equation for a line will give two equations in two unknowns. These can be solved for the slope and y-intercept.

Equation we're substituting into:

y = mx +b

11 = m(1) +b . . . . . substitute (x, y) = (1, 11)

15 = m(2) +b . . . . substitute (x, y) = (2, 15)

Subtracting the first equation from the second gives ...

(15) -(11) = (2m +b) -(m +b)

4 = m

Substituting this into the first equation gives ...

11 = 4 +b

7 = b . . . . . subtract 4

The slope is 4; the y-intercept is 7.

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