In a photoelectric effect experiment,

(4) According to Einstein's photoelectric equation

$K_{\max }=h v-\phi_{0}$

$\Rightarrow e V_{s}=\frac{h c}{\lambda}-\phi_{0}$

$\Rightarrow V_{s}=\frac{h c}{\lambda e}-\frac{\phi_{0}}{e}$

where $\lambda=$ wavelength of incident light

$\phi_{0}=$ work function

$V_{s}=$ stopping potential

Comparing the above equation with $y=m x+c$, we get

slope $=\frac{h c}{e}$

Increasing the frequency of incident radiation has no effect on work function and frequency. So, graph will not change.