ANSWER: Between the 7 and the 8
STEP-BY-STEP EXPLANATION:
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1.7 | 45.78
We want to make the 1.7 into a whole number. We do this by moving the decimal 1 space to the right and since we move the decimal one space on the divisor, we need to move the decimal 1 space on the dividend.
so your problem would now be :
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17 | 457.8
So
x (4%)
y (5%)
x=y+2400
0.04x+0.05y=294
Once you solve them, x=4600 and y=2200
so 4%= $4600
5%= $2200
So for something to be perpendicular the gradient must be the negative reciprocal of your original line so your original gradient is 2 so your new gradient will be -1/2. Then you have y = -1/2 x + c . Now you substitute this into the point (4,-1) to get -1 = -1/2 x 4 + c and -1/2 x 4 = -2 so you have -1 = -2 + c so c = 1 so then you put the equation together to get y = -1/2 x + 1
Hope this helps :))
C (the third one) {(2,1),(-1,7), (6,-2), (10,3),(-6,0)}