Regents Exam Questions - Identifying The Equation Of A Graph Page 3
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3ID: A
A.G.4: Identifying the Equation of a Graph: Identify and graph linear, quadratic (parabolic),
absolute value, and exponential functions
Answer Section
1 ANS: 4
REF: 061221ia
2 ANS:
The y-intercept is -3, and the line has a slope of 2. The equation for the line is
y = 2x − 3 .
.
REF: 060225a
3 ANS: 1
Since the parabola is cupped down, a < 0, eliminating (3) and (4). Based upon the graph, the axis of symmetry is x
= 1.
.
REF: 080017a
4 ANS: 4
REF: 060703b
5 ANS:
a > 0, the y-intercept is
y = x
2
, and the roots are
and 3.
.
+ 3x − 18 .
−18
−6
You can
also use a graphing calculator’s STAT function, input at least three ordered pairs, and calculate the quadratic
regression line of best fit.
.
REF: 010328a
6 ANS: 3
REF: 080925ia
7 ANS: 4
REF: 060314b
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