Student Answer and Work Form Unit 1 Ver. A

1a. Answer: (0, 240,000)(1.0, 228,000) 1a. Key work steps
Found each point of graph

1b. Answer: -12,000 1b. Key work steps
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228,000-240,000 = -12,000
1.0-0 = 1.0

1c. Answer: y= -12,000+240,000 1c. Key work steps y=mx+b (1.0, 228,000)
228,000= -12,000(1.0)+b
228,000+12,000= 240,000
240,000=b

1d. Answer: 84,000 in 2019 1d. Key work steps
0.5 = half years so it went up each year with each 1.0
13.0 represents 2019 y= -12,000(13.0)+240,000 y= -156,000 + 240,000 y= 84,000

2a. Answer: 80= 2L+2(L-5) 2a. Key work steps
Set up equation; no other steps.

2b. Answer: Length- 22.5 inches, Width- 17.5 inches 2b. Key work steps
80=2L+2(l-5)
80=2l+2-10
Combine like terms
90=4L
Divide each side by 4
L=22.5
W=L-5
W=22.5-5
W= 17.5
P= 2L+2W
80= 2(22.5) +2(17.5)

3a. Answer: C= 225 +10x C= 0+25x 3a. Key work steps
Set up equation.

3b. Answer: x<15 3b. Key work steps
225+10x<0+25x
-15x<-225/-15
X<15

4a. Answer: X | Y | -1 | 10 | 0 | 7 | 2 | 1 | 4 | -5 | 4a. Key work steps
Plug in numbers
Y= -3(-1)+7; y= 10 (-1,10)
Y= -3(0)+7; y= 7 (0,7)
Y=-3(2)+7; y=1 (2, 1)
Y= -3(4)+7’; y= -5 (4.-5)

4b. Answer: _______________ 4b. Key work steps