For exponential functions
y=ab^x,
where
a is the scale vertical stretch factor,
b is the base, and
x the exponent (also independent variable)
It is a know fact that if the scale factor (1/2 or 2 in the answer choices) is positive, the graph is increasing if the base (3 or 1/3) is greater than 1.
This means that the base cannot be equal to 1/3. This eliminates choices 3 and 4.
Next, for a base greater than 1 (3>1), and the scale factor positive, it is a dilation (image gets bigger) if the scale factor is greater than 1. This eliminates the first choice where a=2.
This leaves us with the second choice where a=1/2, b=3, which is a shrink of the given exponential base function.
C.
Foil method reverses factor
The correct answer would be letter A, SSS Property. This
states that triangles are congruent if all the sides in one triangle are
congruent to the corresponding sides of another.
<span>The three sides of triangle ABC is congruent to triangle CDA.</span>
Step-by-step explanation:
Distribute over the parenthesis:
Group like terms:
Anything subtracted from itself is 0.
Simplify: