mgkman9814
26.01.2021 •
Mathematics
Identify the first step that contains an error.
Solve:
—38 = 4x – 2(x + 5)
Step 1: -38 = 4x – 2x – 10
Step 2: -38 = 2a – 10
Step 3: –48 = 2.0
Step 4: -24 = 2
What step contains the error
Solved
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Ответ:
The line of best fit is: y = -4.883 + 0.395·x
Step-by-step explanation:
The data provided is:
Time (in min.)Height (ft.)
30 85
45 120
115 298
87 194
160 434
60 241
135 351
117 339
55 180
145 400
95 248
150 370
67 155
120 296
100 271
88 255
138 315
75 215
167 405
120 317
In this case we need to form the line of best fit to predict how long it will take to climb and come back down the three rock formations.
So, the dependent variable is the time and the independent variable is the height.
The general form of the line of best fit is:
y = a + b·x
Compute the values of a and b as follows:
Thus, the line of best fit is:
y = -4.883 + 0.395·x