1. Student id. Every student has a unique student id. So it is a function.
2. The IV curve of resistor. Current voltage of resistor is s direct straight line. Its function as a particular
voltage always result in a particular current.
3. If f(x)=-f(x) the

1. If a vertical line is moved across the graph it is touching the graph at only one point then the
graph is a function.
At a few x places there is more than one y outputs making it is not a function
2. Given that piecewise function:
f(x)=cfw_50 if 0<x<60

Y=0.022*7^2+0.25, y=1.328
First I took the year 2007 and subtracted from the year of 2000. Its come out to be 7. So 7 equals x. I put
the 7 in the equation for x. Square 7 to be 49. 49 times by 0.022 equals to 1.078. 1.078 plus 0.25 equals
1.328.
14=0.022

1 a) The fixed monthly cost is $18000
The cost per calculator is $8 with x being the number of calculators
C(x) = 18000+ 8x
b) We get the average cost by dividing by x
C= 18000+8/x
c i) Average cost when x=200
= 18000+150+(200)/200 =98
The result shows th

1. An arithmetic sequence is a sequence is in which each term after the first differs
from the preceding term by a constant amount. The difference between consecutive
terms is called the common difference of the sequence.
2. A geometric sequence is a sequ

1. What is an exponential function? It is a constant raised to a power of.
2. What is a natural exponential function? The function A, is the number in the function.
3. Evaluate 4^-1.5 using a calculator. Round your answer to 3 decimal places? 0.125
4. The

a) A=xy
b)P=2x + y
But P=150 yards
Therefore 2x + y =150
c)2x + y =150
Y=150 2x
d) A=xy but y=150-2x
A=x(150-2x)
A=150x-2x2
e) rearranging 2x2-150x+A=0
f) -b/2a=-(150)/(2x2) = 37.5
g) inorder to obtain maximum area dx/dy=0
intergrating equation in (e) 4x-

1. A: by looking at the graph the cars value is y=20000-2800x
B: x=5 put in 5 in the substitution of x. y=20000-2800*5 and you should get 6000 because 5
times 2800 is 14000 and 20000 minus from 14000 is 6000
C: X=the number of years
Y= the price of the ca

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