Question

use your equation from part b to predict the city MPG for a car that gets 68 MPG on the highway.equation from part b:y = 7x/9 + 125/9

Answer 1

we have the equation

$y=\frac{7}{9}x+\frac{125}{9}$

so

For y=68

substitute in the given equation and solve for x

$68=\frac{7}{9}x+\frac{125}{9}$

solve for x

Multiply both sides by 9

612=7x+125

7x=612-125

7x=487

x=69.57

round to the nearest whole number

x=70