Y=mx+b
m=slope
b=y intercept
alrighty, find the slope
slope between (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
the slope between (8,-1) and (-4,2) is (2-(-1))/(-4-8)=(2+1)/(-12)=3/-12=-1/4
y=(-1/4)x+b
find b
subsitute a point
(8,-1)
x=8 and y=-1
-1=(-1/4)(8)+b
-1=-2+b
1=b
the y intercept is y=1 or the point (0,1)
Answer:
Political stability is a variable of great importance in a country's evolution since, across time, it was identified as causing law level of economic growth, but also it was presented as a consequence of poor economic development.
Answer:
-2x^2 + 3x -1
Step-by-step explanation:
y = ax^2 + bx + c
(0,-1):
-1 = a(0)^2 + b(0) + c
-1 = 0 + 0 + c
-1 = c
(1,0):
0 = a(1)^2 + b(1) + c
0 = a + b + c
(2,-3):
-3 = a(2)^2 + b(2) + c
-3 = 4a + 2b + c
Replace c with -1
0 = a + b -1
1 = a + b
-3 = 4a + 2b -1
-2 = 4a + 2b
-1 = 2a + b
Solve:
2a + b = -1
-1a - b = -1
a = -2
2a + b = -1
-2a -2b = -2
-b = -3 divide both by -1: b = 3
a = -2; b = 3; c = -1
y = ax^2 + bx + c or y = -2x^2 +3x -1
He would have bought 2 small notebooks and 4 large notebooks. because $12×4= $48 and $6* 2 = $12. $48+$12=$60
