hello
frrom the question given, we have the value of slope and x,y coordinates
slope = 3
x-axis = 3
y-axis = 10
the standard equation of a line is given as
[tex]\begin{gathered} y=mx+c \\ m=\text{slope} \end{gathered}[/tex]let's input the values and solve the question
[tex]\begin{gathered} y=mx+c \\ 10=3(3)+c \\ 10=9_{}+c \\ c=10-9 \\ c=1 \end{gathered}[/tex]NB: c is equals to the intercept
let write out the equation now
[tex]y=3x+1[/tex]from the calculation above, the equation of line is given as y = 3x +1