I think it’s 3 (900 cm2) sorry if it’s wrong.
90 cm because ................................
37 more than t would simply be defined as 
That's all!
y-intercept -3
slope 1/2
is sufficient info with which to write an equation for a straight line:
y = mx + b becomes y = (1/2)x - 3.
You should check this by determining whether or not (2,-1) satisfies this equation.