data=read.table(file.choose(), header=T)
data
##      Y  X1   X2   X3
## 1 57.5  78 2.75 29.5
## 2 52.8  69 2.15 26.3
## 3 61.3  77 4.41 32.2
## 4 67.0  88 5.52 36.5
## 5 53.5  67 3.21 27.2
## 6 62.7  80 4.32 27.7
## 7 56.2  74 2.31 28.3
## 8 68.5  94 4.30 30.3
## 9 69.2 102 3.71 28.7

#scatterplot X1 dan Y

library(ggplot2)

ggplot(data, aes(x=X1, y=Y)) +
  geom_point(color="red",size=3, alpha=0.8) +
  geom_smooth(method="lm", se=TRUE, linewidth=1.2) +
  labs(
    title="Scatter Plot X1 terhadap Y",
    x="X1",
    y="Y"
  ) +
  theme_minimal() +
  theme(
    plot.title=element_text(hjust=0.5, face="bold"),
    axis.title=element_text(face="bold"),
    panel.grid.minor=element_blank()
  )
## `geom_smooth()` using formula = 'y ~ x'

#scatterplot X2 dan Y

library(ggplot2)

ggplot(data, aes(x=X2, y=Y)) +
  geom_point(color="orange",size=3, alpha=0.8) +
  geom_smooth(method="lm", se=TRUE, linewidth=1.2) +
  labs(
    title="Scatter Plot X2 terhadap Y",
    x="X2",
    y="Y"
  ) +
  theme_minimal() +
  theme(
    plot.title=element_text(hjust=0.5, face="bold"),
    axis.title=element_text(face="bold"),
    panel.grid.minor=element_blank()
  )
## `geom_smooth()` using formula = 'y ~ x'

#scatterplot X3 dan Y

library(ggplot2)

ggplot(data, aes(x=X3, y=Y)) +
  geom_point(color="purple",size=3, alpha=0.8) +
  geom_smooth(method="lm", se=TRUE, linewidth=1.2) +
  labs(
    title="Scatter Plot X3 terhadap Y",
    x="X3",
    y="Y"
  ) +
  theme_minimal() +
  theme(
    plot.title=element_text(hjust=0.5, face="bold"),
    axis.title=element_text(face="bold"),
    panel.grid.minor=element_blank()
  )
## `geom_smooth()` using formula = 'y ~ x'