2y = x, because 2 is many pages she can read in a minute, y is the pages, and is the minutes.
Y - 9 = -1/4 ( x + 2)
answer
<span>y−9=−14(x+2)
last one</span>
Answer:
Step-by-step explanation:
Let d = discriminant
d = b^2 - 4ac
Let a = 2, b = 4 and c = -9
We now plug and chug.
d = (4)^2 - 4(2)(-9)
d = 16 - 8(-9)
d = 16 + 72
d = 88
Maximum can be determined by taking derivative and set it equal to zero.