Question

8.

Write the slope-intercept form of the equation for the line.


A. y = 2x – 1

B. y = – 2x – 1

C. y =
`(1)/(2)x-1`

D. y =
`(1)/(2)x+1`

Answer 1

A. y = 2x - 1

Explanation:

1. First, find the slope. You can either use the rise/run method or use the slope formula, y2-y1/x2-x1. For the rise/run method, the rise is 4 and the run is 2, so... 4/2 = 2. If you want to use the slope formula, use the two coordinate sets, (1, 1) and (-1, -3). -3-1/-1-1 = -4/-2 = 2.
2. Next, find your y-intercept. Use the slope-intercept formula, y = mx + b. M stands for the slope and b stands for your y-intercept. You can use either the coordinates (1, 1) or (-1, -3) to plug in for the x and y. In this scenario, I'll use (1, 1).

y = mx + b

Plug in your values. (2 for m)

1 = 2(1) + b

Simplify.

1 = 2 + b

Subtract 2 from both sides.

-1 = b

Finally, form your equation together.

y = 2x - 1

Answer 2

y = 2x – 1

Explanation:

i got a 100%