She can simplify the 12 and the 3.
The slope is 4 because you go up 4 and over one which created the slope 4/1 which is just 4
First, you have to substitute for x, which would make the problem f(x)=7.45(-4.3)+33.7
Now, you just have to use the PEMDAS method (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction)
f(x)= -32.035+33.7
f(x)=1.665
40 square units is teh correct answer
