examday

/TMUA

The graphs of two functions are shown here:

• $y=a^x$ is shown with a solid line, where $a$ is a positive real number
• $y=f(x)$ is shown with a dashed line

Which of the following statements (1, 2, 3, 4) could be true?

• 1 $f(x)=b^x$ for some $b>a$
• 2 $f(x)=b^x$ for some $b<a$
• 3 $f(x)=a^{kx}$ for some $k>1$
• 4 $f(x)=a^{kx}$ for some $k<1$