Answer:
The required expression is:
Please check the attached graph too.
Step-by-step explanation:
The slope-intercept form of the linear or line function
where
- m is the rate of change or slope
In our case,
The cost of hiring a taxi consists of a fixed cost of $3. It means the fixed cost of $3 is the initial condition.
Thus, the y-intercept b = 3
It is stated that the cost of per kilometer distance = $0.5
Thus, the rate of change or slope m = 0.5
As y represents the cost and x represents the number of kilometers.
so substituting m = 0.5 and b = 3 in the slope-intercept form of the linear or line function
y = mx+b
y = 0.5x + 3
Thus, the required expression is:
Please check the attached graph too.
Answer:
The two groups must be as similar as possible. They should be demographically homogeneous and have similar academic performance so as the only variable that is different is the one is tested (extra homework assigned)
Step-by-step explanation:
In this case the scientific method is using an experimental group (the 8th grade class that has extra homework problems) and a control group (the 8th grade class that has not extra homework problems) in order to prove if extra homework helps students learn algebra.
In order to be a valid experiments the two groups should present exactly the same characteristics, except for the variable studied, so they must be as homogeneous as possible.
Answer:
1.6
Step-by-step explanation:
The mean deviation is a measure of dispersion, A measure of by how much the values in the data set are likely to differ from their mean. The absolute value is used to avoid deviations with opposite signs cancelling each other out.
Answer:
0.25 or 25%
Step-by-step explanation:
because the area of circle is 2πr^2 or two radius times together so that both are decreased by 50%