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Does the following table represent a proportional or non-proportional relationship? Explain how you know.

Does the following table represent a proportional or non-proportional relationship-example-1

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Answer:

This table represents a non-proportional relationship.

Explanation:

The equation of the line would be

y = x + 6

The slope is 1. That is the change in y over the change in x. As y changes by 1, the x also changes by 1. 1/1 = 1.

The y-intercept is 6.

We find this by using the slope of 1 and one point that is on the line. I will use the point (3,9). I will use 9 for y and 3 for x and 1 for m.

y = mx + b

9 = 1(3) +b

9 = 3 + b Subtract 3 from both sides

6 = b

y = mx = b Substitute in 1 for the slope and 6 for the y-intercept

y = 1x + 6 (1 times x is the 1x or just x.)

y = x + 6

When a line is proportional it will be in the form

y = mx and not y = mx + b For a line to proportional the b needs to be zero and it is not zero in this case, the y-intercept is 6.

Helping in the name of Jesus.

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User Verdammelt
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