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N76 [4]
3 years ago
15

Y=4x+1 Do x and y vary directly?

Mathematics
1 answer:
vladimir1956 [14]3 years ago
6 0
<span>Slope = 8.000/2.000 = 4.000 
x-intercept = 1/-4 = -0.25000<span> 
y-intercept = 1/1 = 1.00000

</span></span> <span> y-(4*x+1)=0 </span>
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What is the equation of this line?
QveST [7]

Answer:

y = (1/2)x - 3     Answer A is closest.  

Step-by-step explanation:

Two points on the line are (0, -3) and (4, -1).  Notice that I've intentionally chosen "nice" points whose coordinates are integers; this makes the math easier.  The point (1, -5/2) is also on the line if you want to use it, but the math's a bit more complicated.

Going from (0, -3) to (4, -1), x increases by 4 and y increases by 2.  Hence, the slope of this line is m = rise / run = 2/4, or m = 1/2.

The slope-intercept formula for the equation of a straight line is the most convenient to use here, since we can tell immediately from the graph that the y-intercept is (0, -3):

y = (1/2)x - 3

Answer A should be y = (1/2)x - 3 for improved legibility.  1 2 x is not correct as a way to express (1/2)x.

6 0
3 years ago
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The bacteria in an old piece of cheese is growing at a rate that can be modeled by y = 280 • 2^x. Determine which number represe
Katyanochek1 [597]
The answer is <span>C.) 2

The general form of formula is
y = a </span><span>• r^x
y - the total number of bacteria after x period of time
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Let's compare:
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Since r = 2, the growth rate is C.) 2</span>
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3 years ago
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Alchen [17]

Answer:

168

Step-by-step explanation:

21 x 8 pints in a gallon is 168

7 0
3 years ago
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Sergio039 [100]

Answer:

Step-by-step explanation:

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2 years ago
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2/3 x -6 =9<br><br>22 1/2<br>10<br>-22 1/2<br>25<br><br><br><br><br><br><br><br><br>​
Pavel [41]

Answer:

22 1/2

Step-by-step explanation:

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x=15*3/2

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Therefore, x=22 1/2

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3 years ago
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