# \[?\] Plot a continuous function and adding a point in Wolfram|Alpha

**URL:** <https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044>\
**Category:** Questions\
**Tags:** wolfram-alpha, graphics-and-visualization\
**Created:** [May 6, 2019, 8:21am UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044 "2019-05-06T08:21:47Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![gennaroarguzzi](https://avatars.discourse-cdn.com/v4/letter/g/b2d939/32.png) [@gennaroarguzzi](https://community.wolfram.com/u/gennaroarguzzi)\
**Post date:** [May 6, 2019, 8:21am UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044/1 "2019-05-06T08:21:47Z")

</div>

Hello, everyone.  
How can I plot in the same figure a continuous function and a point in Wolfram|Alpha? I tried with:

```
(x-0.1)*(y-0.9)=1 and Graphics[Point[{0, 0}]]

```

but it doesn’t work in Wolfram|Alpha.

Thank you in advance.

---

<div class="post-metadata">

**Author:** ![gianlucagorni](https://avatars.discourse-cdn.com/v4/letter/g/ec9cab/32.png) [@gianlucagorni](https://community.wolfram.com/u/gianlucagorni)\
**Post date:** [May 6, 2019, 12:40pm UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044/2 "2019-05-06T12:40:33Z")

</div>

You may fake it this way:

```
plot ((x - 1/10)*(y - 9/10) - 1) (x^2 + y^2-1/150) == 0

```

---

<div class="post-metadata">

**Author:** ![gennaroarguzzi](https://avatars.discourse-cdn.com/v4/letter/g/b2d939/32.png) [@gennaroarguzzi](https://community.wolfram.com/u/gennaroarguzzi)\
**Post date:** [May 6, 2019, 2:58pm UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044/3 "2019-05-06T14:58:04Z")

</div>

Hello [@Gianluca Gorni](https://community.wolfram.com/web/gianlucagorni) , can you explain me how can I specify the points I want to plot please?  
For example P1=(0,0), P2=(1,2).

---

<div class="post-metadata">

**Author:** ![gennaroarguzzi](https://avatars.discourse-cdn.com/v4/letter/g/b2d939/32.png) [@gennaroarguzzi](https://community.wolfram.com/u/gennaroarguzzi)\
**Post date:** [May 6, 2019, 2:58pm UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044/4 "2019-05-06T14:58:44Z")

</div>

Hello @Gianluca Gorni , can you explain me how can I specify the points I want to plot please? For example P1=(0,0), P2=(1,2).

---

<div class="post-metadata">

**Author:** ![gianlucagorni](https://avatars.discourse-cdn.com/v4/letter/g/ec9cab/32.png) [@gianlucagorni](https://community.wolfram.com/u/gianlucagorni)\
**Post date:** [May 6, 2019, 3:08pm UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044/5 "2019-05-06T15:08:30Z")

</div>

You can try something like this:

```
plot ((x - 1/10)*(y - 9/10) - 1) (x^2 + y^2-1/150) ((x-1)^2 + (y-2)^2 - 1/150) == 0 for x between -5 and 5

```

However, I would suggest using the Wolfram Development Platform for this kind of tasks, instead of Wolfram|Alpha.

---

<div class="post-metadata">

**Author:** ![gennaroarguzzi](https://avatars.discourse-cdn.com/v4/letter/g/b2d939/32.png) [@gennaroarguzzi](https://community.wolfram.com/u/gennaroarguzzi)\
**Post date:** [May 6, 2019, 3:23pm UTC](https://community.wolfram.com/t/plot-a-continuous-function-and-adding-a-point-in-wolfram-alpha/14044/6 "2019-05-06T15:23:39Z")

</div>

Thank you [@Gianluca Gorni](https://community.wolfram.com/web/gianlucagorni)