Answer:
2 gallons left after driving 50 miles
Step-by-step explanation:
Edgar has 7 gallons of gas remaining in his car after driving for 30 miles he had 4 gallons left in the tank
Initially he has 7 gallons of gas
after 30 miles 4 gallons left
Let m be the number of miles and g be the gallons left
(0,7) (30,4)
find slope using formula [tex]\frac{y_2-y_1}{x_2-x_1} =\frac{4-7}{30-0} =\frac{-1}{10}[/tex]
y intercept b= 7
so equation becomes
[tex]g=mx+b\\g=\frac{-1}{10} x+7[/tex]
now find out g when m= 50 miles
[tex]g=\frac{-1}{10} x+7\\ g=\frac{-1}{10}(50)+7=2[/tex]
so 2 gallons left after driving 50 miles
