Y less than 21 = 21 - y
Remember, "less than" indicates a subtraction with the terms in inverted order.
Hope I helped!

if you have already covered slopes, you could also get it that way, in fact is simpler that way.
That would be option A as the angles and sides ( the AS) have already been stated.
Answer:
y = −2x+14
plot the points on a graph, and find the slope :)