12.Practice.Tests.for.the.SAT_2015-2016_1128p

Section 61
Practice Test Six 533
y
y
(-7, z)
----+....._--- x
(5, -1)
.
•
x
4. In the figure above, the slope ofline I is _ _2_.
12
What is the value of z?
(A)
(B)
(C) 1
1
4
1
2
(D) 2
(E) 4
5. The number of turtles in Mosquito Pond has
doubled every three years since the pond was
discovered. The number of turtles in the pond can
t
be described as n = (x)2 3 , where tis the number of
years since the pond was discovered, n is the number
of turtles in the pond at time t, and xis the number
of turtles in the pond when it was discovered. If
there were 160 turtles in Mosquito Pond nine years
after it was discovered, then how many turtles lived
in the pond the year it was discovered?
(A) 2
(B) 10
(C) 20
(D) 40
(E) 160
7. In the graph above, which of the lines described by
the following equations best fits these points?
(A) y = 0.3x - 3
(B) y = 0.7x + 2
(C) y= l.3x-3
(D) y = l.4x + 4
(E) y = 4x - 3
m
co
---+------ n
bo
8. In the figure above, c = 50. What is the value of a - b?
(A) 50
(B) 65
(C) 100
(D) 130
(E) 145
6. If c(x) = x2-6, how many times does the graph of
c(x) cross the x-axis?
(A) 0
(B)
(C) 2
(D) 3
(E) 4
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