Completar frases Linear graphVersión en línea The activity is focus on basic concepts of linear function por Paula Bernat andreu 1 check perpendicular powers plot mx linear parallel positive negative points A function is any function that graphs to a straight line . What this means mathematically is that a linear function has either one or two variables with no exponents or . The equation of a straigh line is usually written this way y = + b . A line with a slope rises from left to right whereas a line with a slope falls from left to right . If two lines have the same slope the lines are said to be . However , if they have negative reciprocal slope the lines are called . You can the graph of a linear function using just two . If you are unsure you can use more points to double - .