Two exponential functions are defined as and

MATHEMATICS · Single correct · AP · AP Precalculus · Exponential and Logarithmic Functions · Exponential and Logarithmic Functions

Problem

Two exponential functions are defined as

p(x)=3\,2^{x}

and

q(x)=5\left(\dfrac{1}{2}\right)^{x}

. Which statement about their

y

-intercepts is correct? (a)

p

has

y

-intercept

5

and

q

has

y

-intercept

3

(b) Both have

y

-intercept

3

(c)

p

has

y

-intercept

3

and

q

has

y

-intercept

5

(d)

p

has

y

-intercept

3

and

q

has

y

-intercept

2.5