In order to keep a specific bacteria alive, the temperature in a science lab cannot exceed -20°F. The electricity went out, when the temperature was -72°F, but is increasing at a rate of 6.5° per hour.

the answer

b. they are parallel and will never intersect.

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system