Answer:
y=3x-13
Explanation:
because it is perpendicular to y=-1/3x+5 the gradient is 3.
so, so far for the line you are working out you have y=3x+c
now substitute the points(1,-10) into this equation
so... -10=3 times 1 +c
which gives
-10=3+c
now solve to get c
so...-10-3=c
-13=c
so the equation of the line is ...y=3x-13