Solve the application involving finding the equation of a line.A driver wants to gauge the fuel efficiency of her vehicle. She notices that traveling at an average speed of 40 mph results in a rating of 40 mpg, whereas at an average speed of 50 mph, her car rates 35 mpg. Assume that the relationship between average speed (mph) and gas mileage (mpg) is linear. Find an equation in slope-intercept form to model the relationship between gas mileage, y, and average speed, x.
A. y = 2x - 20
B. y = 2x + 60
C. y = - 
x + 60
D. y = - 
x - 20
Answer: C
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Determine the equation of the given line, as well as the slope of the line. If the slope is undefined, state this.
A. x = -4, m: undefined B. y = x - 4, m = 0 C. y = -4, m: undefined D. y = x - 8, m = 1
Find the indicated term of the binomial expansion.(6x + 3y)9; term containing x5
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