Solved on Dec 12, 2023

Find the y-intercept of the additive relationship between xx and yy given in the table: x={2,3,4,5,6}x = \{2, 3, 4, 5, 6\}, y={7,8,9,10,11}y = \{7, 8, 9, 10, 11\}.

STEP 1

Assumptions
1. The relationship between xx and yy is additive, which means y=mx+by = mx + b, where mm is the constant rate of change (slope) and bb is the yy-intercept.
2. The values of xx and yy are given in the table.
3. We need to find the yy-intercept (bb) of the relationship.

STEP 2

Determine the rate of change (slope) mm by calculating the change in yy over the change in xx between any two points in the table.
m=ΔyΔxm = \frac{\Delta y}{\Delta x}

STEP 3

Choose two points from the table to calculate the slope. We can use the first two points (2,7)(2, 7) and (3,8)(3, 8).
m=8732m = \frac{8 - 7}{3 - 2}

STEP 4

Calculate the slope mm.
m=11=1m = \frac{1}{1} = 1

STEP 5

Now that we have the slope, we can use the point-slope form of the equation to find the yy-intercept bb. We can use any point from the table for this purpose. Let's use the first point (2,7)(2, 7).
yy1=m(xx1)y - y_1 = m(x - x_1)

STEP 6

Substitute the slope mm and the coordinates of the point (x1,y1)(x_1, y_1) into the point-slope form equation.
y7=1(x2)y - 7 = 1(x - 2)

STEP 7

Simplify the equation to find the yy-intercept bb.
y=x2+7y = x - 2 + 7

STEP 8

Combine like terms to get the equation in the form y=mx+by = mx + b.
y=x+5y = x + 5

STEP 9

From the equation y=x+5y = x + 5, we can see that the yy-intercept bb is 5.
The yy-intercept of this additive relationship is 5.

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