A line is parallel to y=4x+5 and passes through the point (-1,6). Find the equation of the line L in the form y=ax+b. Find also the coordinates of its intersections with the axes.



Answer :

Answer:

A line is parallel to y=4x+5 and passes through the point (-1,6). Find the equation of the line L in the form y=ax+b. Find also the coordinates of its intersections with the axes.

To solve the problem, let's break it down into two parts:

1. Equation of the Line

L

L

The given line is

y

=

4

x

+

5

y=4x+5. The slope

m

m of this line is 4, since the equation is in the form

y

=

m

x

+

c

y=mx+c.

For two lines to be parallel, they must have the same slope. Therefore, the line

L

L must also have a slope of 4. The equation of line

L

L can be written as:

y

=

4

x

+

b

y=4x+b

Now, we need to find the value of

b

b using the point

(

1

,

6

)

(−1,6), which the line

L

L passes through.

Substitute

x

=

1

x=−1 and

y

=

6

y=6 into the equation:

6

=

4

(

1

)

+

b

6=4(−1)+b

6

=

4

+

b

6=−4+b

b

=

10

b=10

So, the equation of the line

L

L is:

y

=

4

x

+

10

y=4x+10

2. Intersections with the Axes

Intersection with the

y

y-axis:

To find the intersection with the

y

y-axis, set

x

=

0

x=0:

y

=

4

(

0

)

+

10

=

10

y=4(0)+10=10

So, the intersection with the

y

y-axis is

(

0

,

10

)

(0,10).

Intersection with the

x

x-axis:

To find the intersection with the

x

x-axis, set

y

=

0

y=0:

0

=

4

x

+

10

0=4x+10

4

x

=

10

4x=−10

x

=

5

2

x=−

2

5

So, the intersection with the

x

x-axis is

(

5

2

,

0

)

(−

2

5

,0).

Final Answer:

Equation of the line

L

L:

y

=

4

x

+

10

y=4x+10

Intersection with the

y

y-axis:

(

0

,

10

)

(0,10)

Intersection with the

x

x-axis:

(

5

2

,

0

)

(−

2

5

,0)