An x-bar control chart was examined and no data points fell outside of the limits. can this process be considered in control?
a. not yet, there could be a pattern to the points.
b. not yet, the r-chart must be checked.
c. not yet, the number of samples must be known.
d. yes. both a and b

the mean and mad

step-by-step explanation:

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²

what are the answer choices given for this problem?