Answer:
The slope of the line
Explanation:
Y = a + bx describes a straight line in which the value of y depends on the value of x. Specifically, y will be b times x, plus the value of a. The b is described as the slope of the line. If b is 5, the term 5x tells us that y will increase by 5 for every 1 increase in x. The is also sometimes called the rate of the line. Since it is positive, the line will move up as it goes from left to right. A negative value of b would result in the line moving down from left to right. The term a is an amount that is added to each bx, so it is the value of y when x = 0, known as the y-intercept. b is known as the slope of the line.