Go through the Math in Focus Grade 8 Workbook Answer Key Chapter 4 Lines and Linear Equations to finish your assignments.

## Math in Focus Grade 8 Course 3 A Chapter 4 Answer Key Lines and Linear Equations

### Math in Focus Grade 8 Chapter 4 Quick Check Answer Key

**Tell whether each graph represents a direct proportion. If so, find the constant of proportionality. Then write a direct proportion equation.**

Question 1.

Answer:

If y = kx then y is said to be directly proportional to x.

y = 10x

y/10 = x

Thus the above graph is said to be constant of proportionality.

Question 2.

Answer: y = 1/10 x

The above graph is not direct proportion.