A line passes through #(9 ,2 )# and #( 3, 5 )#. A second line passes through #( 4, 8 )#. What is one other point that the second line may pass through if it is parallel to the first line?

Answer 1

#color(green)(""(20,0))#

The slope of the first line through #(9,2)# and #(3,5)# is #color(white)("XXX")color(green)(m)=(Deltay)/(Deltax)=(5-2)/(3-9) = color(green)(-1/2)#
A second line through #(4,8)# parallel to the first line must also have a slope of #color(white)("XXX")color(green)(m)=color(green)(-1/2)# That is #color(white)("XXX")color(green)(m)=(bary-8)/(barx-4)=color(green)(-1/2)# for all points #(barx,bary)# on the second line. #rarrcolor(white)("XXX")2bary-16=4-barx#
#rarrcolor(white)("XXX")barx= 20-2bary#
To find a point on the second line pick an arbitrary value for #bary# and solve for #barx# For example, if #bary=0# #color(white)("XXX")barx=20-2 * 0 = 20# giving us the point #(20,0)# on the second line.
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Answer 2

If the second line is parallel to the first line, it will have the same slope as the first line. To find the slope of the first line, we use the formula:

m=y2y1x2x1m = \frac{{y_2 - y_1}}{{x_2 - x_1}}

Using the points (9, 2) and (3, 5), we get:

m=5239=36=12m = \frac{{5 - 2}}{{3 - 9}} = \frac{{3}}{{-6}} = -\frac{{1}}{{2}}

So, the slope of the first line is -1/2. Since the second line is parallel to the first line, it will also have a slope of -1/2.

Now, using the point-slope form of a line equation:

yy1=m(xx1)y - y_1 = m(x - x_1)

We can use the point (4, 8) and the slope -1/2 to find the equation of the second line:

y8=12(x4)y - 8 = -\frac{1}{2}(x - 4)

Solving this equation for yy, we get:

y=12x+10y = -\frac{1}{2}x + 10

Now, to find another point on this line, we can choose any value of xx and plug it into the equation to find the corresponding yy value. For example, if we choose x=0x = 0, then:

y=12(0)+10=10y = -\frac{1}{2}(0) + 10 = 10

So, another point on the second line is (0, 10).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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