title: Trying to bold y axis in ggplot
body: <p>I am trying to bold my y-axis. The title for the axis is bold, but I can't seem to figure out how to bold the number themselves. Here is my code so far, </p>
  
  <pre><code>combine.df %&gt;% filter(site== "indian_creek") %&gt;%
  ggplot(aes(x = percent_corn, y = flow_concentration)) +
  geom_smooth(method = "lm", color="black") +
  geom_point(color=dark_umber, size=5) + 
  scale_y_continuous(label=scientific_10, bold) +
  scale_x_continuous(breaks = seq(46, 58, by=2)) +
  theme(plot.subtitle = element_text(vjust = 1), 
  plot.caption = element_text(vjust = 1)) +labs(title = "Indian Creek", 
  face="bold", x = "Cultivated Crop as Corn (%)",
  y = expression(bold(Weighted~Flow~NO[3]-N~(kg/m^{3}))))  +
  theme(
  # LABLES APPEARANCE
  plot.title = element_text(size=14, face= "bold", colour= "black" ),
  axis.title.x = element_text(size=14, face="bold", colour = "black"),    
  axis.title.y = element_text(size=14, face="bold", colour = "black"),    
  axis.text.x = element_text(size=12, face="bold", colour = "black"), 
  axis.text.y = element_text(size=12, face="bold", colour = "black"),
  strip.text.x = element_text(size = 10, face="bold", colour = "black" ),
  strip.text.y = element_text(size = 10, face="bold", colour = "black"),
  axis.line.x = element_line(color="black", size = 0.3),
  axis.line.y = element_line(color="black", size = 0.3),
  panel.border = element_rect(colour = "black", fill=NA, size=0.3)
  )
  </code></pre>
  
  <p>I have seen similar questions but haven't figured out the right answer for my problem. Thanks</p>