Two friends, Grace and Mila, had just bought their first cars. The equation y = 38.2x represents the number of miles, y, that Grace can drive her car
for every x gallons of gas. Mila uses 6 gallons of gas to drive 222.6 miles in
her car.
How much farther can Grace's car travel on one gallon
of gas than Mila's car?

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.

graph #4 (last graph) depict the function   f(x)= -m(x-d)^1/5 i

step-by-step explanation:

we know that

m=slope

but in this function slope is -m that means slope is decreasing and it is decreasing by 1/5 points down the x-axis.

which is shown in graph four

a decreasing slope down x-axis by 1/5 points.

hence 4th graph is the right option for this.