Aiu Math 133 Unit 1 Ip

Student Answer and Work Form Unit 1 Ver. A

Student Name (required): Amanda Barnhart _________________________________

1a. Answer: (1.0,228000) (2.0,216000)_______________

1a. Key work steps

This was simply reading and recording points on the graph. I chose the middle two.

1b. Answer: -1/5 is the slope. _______________

1b. Key work steps

This is simply counting rise over run. Because it is downward, it is negative.

1c. Answer: y= -1/5(2.0)+216,000 y=215,999.60 _____________

1c. Key work steps

I simply took the basic slope-intercept equation and put in the correct values where b is equal to the y intercept.

1d. Answer: $83,997.40 would be the value in 2019 _______________

1d. Key work steps

Y=-1/5(13)+84,000

Y=83,997.40

2a. Answer: 80=4L-10 _______________

2a. Key work steps

Add 10 to both sides to get the L by itself.

90=4L

Divide both sides by 4

L=22.50

2b. Answer: length=22.5 w=17.5 _______________

2b. Key work steps

See above work for length. Subtract 5 for length.

3a. Answer: Option 1: C=$225+$10(x)

Option 2: C=$25(x)

_______________

3a. Key work steps

This was simply putting the correct values in the correct equations.

3b. Answer: 15 inches the ad must be more than 15 inches for option one to be cheaper. _______________

3b. Key work steps

225+10(x)<25(x)

Subtract 10x from both sides

225<15x

Divide by 15

X>15

4a. Answer: -1,10

0,7

2,1

4,-5

_______________

4a. Key work steps

Y=-3(-1)+7

Y=10

Input all x points to find y’s

4b. Answer: _______________

4b. Key work steps