The correct Option is A. $6.80
Explanation:
For first 16 kWh => $2
For next (80 - 16 = 64 kWh) => 64 * $0.075 = $4.8
Add both of them:
$2 + $4.8 = $6.80 (Option A)
So y=mx+b form
m=slope=rise over run
b=y intercepe or where it crosses the y axis
so one way is to input values for x and get vales for y exg
if x=1 then y=-2
if x=2 then y=1
if x=0 then y=-5 so some points are
(x,y)
(1,2)
(2,1)
(0,-5)
(3,4)
then plot those points
Answer:
1/52
Step-by-step explanation:
4/208=1/52
Mult. the 2nd eqn by 6 and then add this "new" equation to the 1st given eqn:
-6x + y = -2
6x -18y = 54
--------------------
-17y = 52, or y = -52/17. Subst. this value of y into either equation to find the value of x.