Answer:
2+2= 4 and 2÷2= 1
Step-by-step explanation:
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Answer:
Size
Step-by-step explanation:
Just got the answer out
Answer:
6
Step-by-step explanation:
I used a calculator. :)
Answer:
Here's what I get.
Step-by-step explanation:
1. Representation of data
I used Excel to create a scatterplot of the data, draw the line of best fit, and print the regression equation.
2. Line of best fit
(a) Variables
I chose arm span as the dependent variable (y-axis) and height as the independent variable (x-axis).
It seems to me that arm span depends on your height rather than the other way around.
(b) Regression equation
The calculation is easy but tedious, so I asked Excel to do it.
For the equation y = ax + b, the formulas are

This gave the regression equation:
y = 1.0595x - 4.1524
(c) Interpretation
The line shows how arm span depends on height.
The slope of the line says that arm span increases about 6 % faster than height.
The y-intercept is -4. If your height is zero, your arm length is -4 in (both are impossible).
(d) Residuals

The residuals appear to be evenly distributed above and below the predicted values.
A graph of all the residuals confirms this observation.
The equation usually predicts arm span to within 4 in.
(e) Predictions
(i) Height of person with 66 in arm span

(ii) Arm span of 74 in tall person

Answer:
The cheapest item is T shirt costing $13.
Step-by-step explanation:
Let the cost of T shirt = $ m
So, the cost of the headset = $ (2m)
and, The cost of Sneakers = $ ( m + 25)
Total amount spent by Jose = $77
Now, According to the question:
$ m + $ (2m) + $ ( m + 25) = $77
or, 4m + 25 = 77 ⇒ 4m = 77 - 25 = 52
or, m = 52/4 = 13
⇒ The cost of one T- Shirt = m = $ 13
The cost of the headset = (2m) = 13 x 2 = $ 26
The cost of Sneakers = $ ( m + 25) = 13+ 25 = $ 38
As, out of all costs, $13 is the lowest cost
Hence, the cheapest item is T shirt costing $13.