Answer:
The answer that represent a negative slope and a y-intercept 50 is letter C.
Step-by-step explanation:
The answers are represented like a general equation Ax + By + C = 0, so you need to clear "y" to find slope-intercept form of a line y=mx+b, where m is the slope and b is the intercept, so if you clear:
a) y = (10x - 40)/5 .... in this ecuation the slope is positive and the ininterception 40 negative.
b) y = (5x +12)/10 .... in this ecuation the slope is positive and the interception 12 positive.
d) y= (x-10)/2 .... in this ecuation the slope is positive and the interception 10 negative.
c) y = 50 - 5x, in this ecuation the slope is negative, and the interception 50 positive, so this is the correct answer.