Nelda drove 315 kilometers and used 35 liters of gasoline. Her car averaged how many kilometers per liter of gas?​

Going 315 km uses up 35 liters of gasoline

On average, 1 liter of gasoline can travel the number of kilometers:

315 : 35 = 9 liters of gasoline

y = -1x + 1

Step-by-step explanation:

Calculate the slope from two points:

I picked (0,1) and (4,-3)

Rise = (-3 - 1) = -4

Run = (1 - 0) = 4

Slope or Rise/Run = -4/4 or -1

y = mx + b, where m is the slope and b is the y-intercept (the value of y when x = 0).  We can find the y-intercept since we have point (0,1).  b is 1.

Putting the slope and y-intercept into the equation:

y = -1x + 1