-2 | 2 4 2 8 8
. | . -4 0 -4 -8
-------------------------------
. | 2 0 2 4 0
which translates to
1.5 cups of sugar
>>
1/8 cup PER batch * 12 batches
(1/8)*12 = 1.5 cups
Let X = the number of pennies.
The number of nickels would be 2X
A penny is 0.01 and a nickel is 0.05
Now you have:
0.01x + 2(0.05x) = 8.80
Simplify:
0.01x + 0.10x = 8.80
Combine like terms:
0.11x = 8.80
Divide both sides by 0.11:
x = 8.80 / 0.11
x = 80
Pennies = X = 80 total pennies.
Nickels = 2x = 2 *80 = 160 nickels.
The answer is D. It can't be considered a funtion unless each X value only has 1 Y value corresponding to it. In this problem, you see the X value 3 paired with -1 and 1.
y=-3x/2
because gradient =-3/2
and u must use formula (y-y1) = m(x-x1)