Y-intercept -is a little higher than 17, best what we can see 17.2
To find slope we can choose 2 points that are on the line.
For example, (180, 10) and (30, 16)
slope = (y2-y1)/(x2-x1)=(16-10)/(30-180)=6/(-150)= - 0.04
y= - 0.04x+17.2
Answer:
n=11
Step-by-step explanation:
(n+4)/10 = (n-8)/2
We can solve using cross products
(n+4) * 2 = 10 * ( n-8)
Distribute
2n+8 = 10n -80
Subtract 2n from each side
2n+8-2n = 10n-80-2n
8 = 8n-80
Add 80 to each side
8+80= 8n-80+80
88 = 8n
Divide each side by 8
88/8 = 8n/8
11 = n
1.60/20 =0.08
0.08 per pen
Y = -1
x = 5
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