Answer:
![y=7](https://img.qammunity.org/2021/formulas/mathematics/high-school/56oz84dpi2imoesy93dms9iljhs7ozzpws.png)
Explanation:
First, let's use the two given points to find the slope. Remember the slope equation:
![m=(y2-y1)/(x2-x1)](https://img.qammunity.org/2021/formulas/mathematics/high-school/s22vchztbo0z3zfbr5dy5rbx0ndd5ffwx5.png)
![m=(7-7)/(0-4)](https://img.qammunity.org/2021/formulas/mathematics/college/ymwc0j62vdxxaqmsytevayrfpyhascgg4o.png)
![m=(0)/(-4)](https://img.qammunity.org/2021/formulas/mathematics/college/2b6wvnampnk2q85vr05sxlsdpj4wtbf5cl.png)
![m=0](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ejo7v6f8apqzf3aovi8oslh98eb9n0jrik.png)
If we're following slope-intercept form, what we have so far is
![y=0x+b](https://img.qammunity.org/2021/formulas/mathematics/college/t0xm89ghmk1vd575si85l0uwy5zlg9ofq2.png)
Substitute one of the given points for the
and
values in order to find
:
![7=0(4)+b](https://img.qammunity.org/2021/formulas/mathematics/high-school/8i5fyiiy81hgx5mm60u0rxsrw5w1j056vx.png)
![7=b](https://img.qammunity.org/2021/formulas/mathematics/high-school/zgpu5hs3jotgr5bv0zu67aglfv5rger3sw.png)
Now, if we put that back into our slope-intercept equation we get
![y=0x+7](https://img.qammunity.org/2021/formulas/mathematics/high-school/2lctdi0fddwjs3f9ypbtpw7qef98zue8jq.png)
or,
![y=7](https://img.qammunity.org/2021/formulas/mathematics/high-school/56oz84dpi2imoesy93dms9iljhs7ozzpws.png)
Right off the bat, we can see how we ended up with this equation because both points have the same y-values. This indicates a horizontal line.
I hope this helps!