Pls help Whats the equation?

y = -5x + 6

Step-by-step explanation:

First, we need to find the slope, which would be m in the equation. To find m, we can use the formula called "rise over run". Here's the formula:

So, to use this formula, you pick two points from the line that you're given and solve for m.

Let's use the points (1,1) and (0,6). x1 would be 1, x2 would be 0, y1 would be 1, y2 would be 6

   So, the slope is -5

Then, we need to find the y intercept, which would be b in the formula.

We can see that the point where the line meets the y axis is at (0.6), so the y intercept would be 6.

Now let's put everything together:

y = mx+b

y = -5x + 6

$240

The reason why is because the friend charges $30 a car and has fees of $15/hour.  So you multiply the $30 by the amount of cars, which is 12.  You get $360.  Then, you multiply the fees ($15) by the amount of hours (8) to get $120.  You take the money you earn, which is $360, and subtract it by the total fees, which is $120.  $360-$120=$240.

Hope this helps! :D