After this answer is simplified, the answer is A) 3.9a+b
You use the slope formula to classify a quadrilateral as a parallelogram or rectangle. you use the distance formula to see if it is a trapezoid.
The answer has to be in y-intercept form. Which is y=mx+b and b can also be neg. y=mx-b. The m is your slope and b is your y-intercept. So A’s slope counting from 3 on the y axis to 1 on the x-axis which is down 2 over 1 so it will be -2/1. And your y intercept is 3. The equation is y=-2x+3. For B its the same thing but no graph. Remember that slope is RISE over RUN. So since the number is on the bottom of the line the rise is 4 and the run is 1. So in this case 10 is your y-intercept. Which means you equation is y=4x+10.
The ratio of the robot's height to its arm length is 24 to 12 or 2 to 1. So if its height is 6 meters, then its arm length is 3 meters.
The length and width is 42 and 23 inches so all we need to do is multiply it.
43×23=966 square inches.
The answer is C. 966 in^2