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1 answer:
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A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely. The correct option is A.
<h3>What is the equation of a line?</h3>A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely. The equation of line is given by,
y =mx + c
where,
x is the coordinate of the x-axis,
y is the coordinate of the y-axis,
m is the slope of the line, and
c is constant.
The graph of the question is mentioned below.
If we look the function given below then it can be observed that the given graph is linear. Also, the line passes through (0,0) and (3,1).
The slope of the line is,
Slope, m = (1-0)/(3-0) = 1/3
The y-intercept of the line is at the origin. Thus, the equation can be written as,
y = (1/3)x + 0
y = (1/3)x
Hence, the correct option is A.
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Answer:
Amount invested at 7% = 16000
Amount invested at 9% = 12000
Step-by-step explanation:
Let x be the amount invested at 7% and y be the amount invested at 9%.
Since the total amount invested is $28000, therefore, we can set up the first equation as:
Secondly, we are give that sum of two investments is $2200. Therefore, we can write the second equation as:
Now we need to solve these two equations to get the values of x and y.
First of all, we multiply the second equation with 100 in order to get rid of decimal values.
Let us use substitution method here. First of all we will solve for y from first equation and plug that into second equation.
Therefore, amount invested at 7% is $16000 and amount invested at 9% is 28000-16000=$12000.