R: Guided Project: NYC Schools Perceptions error when creating scatterplot

Hi, I’m stuck on an error when trying to create scatterplots for Guided Project NYC Schools Perceptions in R Studio. I get errors whether I follow the solution or try to do them manually. Everything works up to this moment:
ggplot(data = combined_survey) +

  •     aes_string(x = "SAT Math Avg. Score", y = "avg_sat_score") +
    
  •         geom_point(alpha = 0.3) +
    
  •  theme(panel.background = element_rect(fill = "white"))
    

Error in parse(text = x) : :1:5: unexpected symbol
1: SAT Math
^

Here are the solutions that I have been following (https://github.com/dataquestio/solutions/blob/master/Mission327Solutions.Rmd)
and it gives me the same error when I do:
create_scatter <- function(x, y) {
ggplot(data = combined_survey) +
aes_string(x = x, y = y) +
geom_point(alpha = 0.3) +
theme(panel.background = element_rect(fill = “white”))
}
x_var <- strong_cors$variable[2:5]
y_var <- “avg_sat_score”
map2(x_var, y_var, create_scatter)

Please help!

Hi, I’ve completed this part and here is my code. I have generated scatter plots

gen_scatter <- function(x, y) {
  ggplot(data = combined_survey) +
    aes_string(x = x, y = y) + 
    geom_point(alpha = 0.3) +
    theme(panel.background = element_rect(fill = "white"))
}

x_variables <- strong_correlations$variable[2:5]
y_variables <- "avg_sat_score"

map2(x_variables, y_variables, gen_scatter)

I did this in an R notebook in RStudio as per mission instructions