Question

What is the slope of the line described by the data in the table below?

Answer 1

Answer:

D

Step-by-step explanation:

General Equation: y = mx + b

You need two pieces of data to solve this.

When x = 1, y = 8

8 = 1x + b

When x = -1, y = 3

3 = - x + b

==================

8 = x + b

3 = -x + b     If we add we get b so let's add.

11 =2b          Divide by 2

11/2 = b

==================

y = mx + b

y = mx + 11/2      Now we can solve for m

3 = -m + 11/2      Subtract 11/2

3 - 11/2 = - m

- 2  1/2 = -m        multiply by - 1

2  1/2 = m

m = 5/2

The answer is D

Answer 2

The answer to the problem is C