2. The Smiley family had a $62.00 bill and service was great! They tip 20%. What is the total they paid?

By definition, a linear equation in its standard form is given by:
 
 Where,
 m: slope of the line
 b: cut point with the y axis (occurs when x = 0)
 The value of m, b is constant.
 Therefore, the value of the rate of change of the function, which is represented by the slope of the line, is constant.
 This means that for each value of x, the value of the function increases m times.
 
 d.The change in y-values is constant for evenly spaced x-values.