Which pair of equations represents two perpendicular lines? option a: -3x +2y = 10 and 3y = 2x +12 option b: 2x + 5y = 45 and y + 2/5x = -9 option c: x= 4y +4 and x +4y=4 option d: 7x + 4y= 20 and y-3=4/7x

For the equation of the line expressed as Ax + By + C = 0, the value of the slope (m) is calculated by -A / B. For perpendicular lines, the slope of one should be the negative reciprocal of the other. From the choices given, the lines that are perpendicular is Option A. 

Iwould say rat and vsu but i’m not 100% sure

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.