Answer: Choice C The pink equation is y = 2x-3 The yellow equation is y = -2x+1
Notice how the pink equation crosses the y axis at (0,-3) or at -3 on the y number line. This tells us that the pink equation has a y intercept of -3. So b = -3 This only happens with the equation y = 2x-3. The other equations do not have a y intercept of -3. So this quickly rules out the other choices leaving C as the only answer.
An alternative is to find two points on the pink line, such as (0,-3) and (1,-1). Then find the slope of the line through those points. You should find the slope to be m = 2. So m = 2 and b = -3 leads to y = 2x-3. Follow similar steps for the yellow line as well.
So we would begin this problem with the simple interest equation: A=P(1+rt) the t (time) is in years so we divide 120 by 365 Then we can plug in the information we already know A=8000(1+.095(.33)) A=8000(1.03135) A=8250.8 So in total, it is $8250.80
