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Answer:
<u> 2y + 3x = 3</u>
Step-by-step explanation:
The standard form of equation of a line is expressed as;
y = mx+c
m is the slope
b is the intercept
We are to find the equation of a line passing through the points (-3,19) and (6,-2)
First get the slope
m = y2-y1/x2-x1
m = -2-19/6-(-3)
m = -21/9
m = -7/3
Get the y- intercept b;
Substitute the coordinate (6, -2) and m = -7/3 into the expression y = mx+b and get b;
-2 = -7/3(6) + c
-2 = -7/2 + c
c = 7/2 - 2
c = (7-4)/2
c = 3/2
Substitute the slope and intercept into the formula
y = mx+b
y = -7x/2 + 3/2
Multiply through by 2;
2y = -7x + 3
2y + 7x = 3
Hence the required equation is<u> 2y + 7x = 3</u>
Answer: No, he needed to apply the exponent to all factors in the product in the second step.
Answer:
Good sampling technique
Step-by-step explanation:
In other to determine the mean value for a population, it may be necessary to make inference from the a small subset of the population, called the sample, if it is impossible, difficult or inefficient to get all population data. Hence, in other to select a subset of the population, then the sample must be selected at random, such that all elements of the population have equal chances of being selected and hence, be representative of the population. Since, the sampling technique adopted above is done at random, hence, it is a good sampling technique.