Wrist bands are $1.25 each. Write a direct proportion equation to show the total cost (c) for any number of bands (b)
1 answer:
Answer:
Step-by-step explanation:
If we know that each band costs $1.25, then we know that 2 bands are $2.50, 3 bands are $3.75 etc. The equation above simply states that each band is $1.25, so $1.25 multiplied by the number of bands gives us a total cost. This follows the formula , for a direct proportion equation. Hope this helped :)
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Answer:
The line equation is:
Step-by-step explanation:
Given
- The point = (4, 8)
- m = -1/4
We know that point-slope form of the line equation is
where
- m = slope
- (x₁, y₁) = point
substituting the values m = -1/4 and the point (4, 8)
Add 8 to both sides
Thus, the line equation is:
Mean of data = sum of values ÷ number of data
We have three values; 84, 87, and
Sum of values =
= 
We want the value of to give mean between 85 and 90 inclusive
Hence, the value of is between 84 and 99 inclusive
We have three values; 84, 87, and
Sum of values =
We want the value of
Hence, the value of