Exercise 4 Page 106

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A proportional relationship follows the form y= kx, where x represents input values, y represents output values, and k represents the constant of proportionality. Let's consider the given equation. y=0.5x-2 The given equation already has an isolated y-variable and is not in the form of y= kx. Therefore, we can say that y is not in proportional relationship with x and there is no constant of proportionality.

In Part B, we want to consider another equation. Let's take a look. y= 1000x The given equation is in the form of y= kx. Therefore, we can say that y directly varies with x and the constant of proportionality is 1000.

Now, let's consider the equation from Part C. y=x+1 The given equation has an isolated y-variable and is not in the form of y= kx. Therefore, we can say that y is not in proportional relationship with x and there is no constant of proportionality.

Subchapter links

Do You Understand? p.106

Do You Know How? p.106

Practice & Problem Solving p.107-108

Assessment Practice p.108

Exercise 4 Page 106

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