CAN ANYONE HELP... Can't seem to figure these out!!!?

Question

calculate the slope, x-intercept, and y-intercept, and label the intercepts

1.Find an equation in slope-intercept form passing through the points (-6.2,18.1) and (-3.4,18.1).

2.Tom buys $20,000 worth of stock, and sells it eight months later for $28,000. If he is required to pay 15% capital gains tax on his profits, how much tax will he pay?

Answer 1

1.
slope = (18.1-18.1)/ (-3.4+6.2)=0
so
the equation of the line is:
y-18.1=0, i.e.
y=18.1

2.
tax = 0.15(28000-20000) = 0.15(8000)
= 1200

Answer 2

1.Find an equation in slope-intercept form passing through the points (-6.2,18.1) and (-3.4,18.1).

slope: since y1=y2, slope is 0 so y=b=18.1

2.Tom buys $20,000 worth of stock, and sells it eight months later for $28,000. If he is required to pay 15% capital gains tax on his profits, how much tax will he pay?

$28000-$20000=$8000 capital gain
$8000*15%=$1200

Answer 3

1. slope = change in y / change in x =
(18.1 - 18.1) / (-3.4 - (-6.2)) = 0.

So, the equation has the form y=b. Plug in the y-value from either point for y, and you get b=18.1, so the equation is y=18.1.

2. Tax = 0.15*(28000-20000) = 0.15*8000 = 1200.

Answer 4

y-y1=m(x-x1)

m=(y2-y1)/(x2-x1)
m=(0)/9.6
m=0
so the line is PARALLEL TO THE X AXIS

x intercept =0;


line is y=18.1
y intercept is 18.1


2)
gain=(28000-20000)
=8000

capital tax=15% gain
=15/100*8000
=1200

Answer 5

2. $8000 / 15% =1200

Answer 6

1.) y=mx+ b

18.1 - 18.1 delta y
_________ = ______ = m (slope)

6.2 - (-3.4) delta x

0
______ = 0 (an horizontal line)

9.6

y + mx + b, y = 0x + 18.1,

y= 18.1

2.) Buys @ $20,000
Sells @ $28,000
Capital gain = $8,000
Capital gains tax = .15 x 8,000 = 1,200
$1,200