12. In 1990, a house was purchased for $120,000. In 2000, it was appraised for $
ID: 3117032 • Letter: 1
Question
12. In 1990, a house was purchased for $120,000. In 2000, it was appraised for $150,000. Find the average rate of change (i.e. the slope) of the value of the house over time in years A. -30,000 B.-3000 C. 300 D. 3000 E. 30,000 13. Identify the equation of the vertcal line that passes through the point (7.2) A. x-7 B. y-7 C. x=0 E. x 2 14. An input c of a function f is called a zero of the function if... A. f(0) c B. f(c)-c C. f(c)-0 D. c.f(x)-0 E. f(x)=c Chapter 2 15. Using visual observation, determine whether each graph is symmetric with respect to the x-axis, the y-axis, and/or the origin. a) b) c) d) 16. Determine algebraically whether the function f(x)--x+2x is even, odd, or neither 17. Find the following using the piecewise defined function f(x)- ifx 20 a) f(-1) b) f(4) e) r(o) d) f(-3)Explanation / Answer
12)In 1990, purchased rate = 120000
In 2000, appraised rate = 150000
The average rate of change = 150000-120000/(2000-1990)
=30000/10=3000
option (D)
13)The vertical line that passes through (7,2) is parallel to y axis
Hence y=2
option (D)
14)An input c of a function is called zero of the function if
F(c)=0
15) graph (a) is symmetrical with y axis
graph (b)is symmetrical with x axis
graph (c) is not symmetrical
graph (d) is symmetrical about x , y and origin
16) f(x)= x^3+2x
now f(-x)= (-x)^3+2(-x)
=- f(x)
hence it is odd function.
17) F(-1)= 2-x=2-'(-1)=3
F(4)= root of 4 =2
F(0) =root 0 =0
F(-3)= 2-(-3)=5
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