The slope characterizes the inclination angle to the horizontal axis (angular coefficient is numerically equal to the tangent of the angle). The slope is present in the equation of a straight line and is used in the mathematical analysis of the curves, where the slope is always equal to the derivative of the function. To better understand the slope, imagine that it affects the speed of function changing, that is, the greater the value of the slope, the greater the value of the function (with the same value of the independent variable). The coefficient k in the line formula y = kx + b on the coordinate plane is numerically equal to the tangent of the angle, which constitutes the smallest turn of the Ox axis to the Oy axis, between the positive direction of the x-axis and a straight line. The tangent of the angle can be calculated as the ratio of the opposite leg to an adjacent leg.
PHASE TWOLITERARY WORKS REVIEW2 . 1IntroAdvertising is definitely increasingly important in our modern life (Munusamy & Wong, 2007). It was because it can use to transmit some text to a great number of people easily (Al-Boloshi, 2010). Hence, many analysts have done their research regarding advertising. For example , there are many analysts test about the entertainment, informativeness, and credibility of mobile promoting (Haghirian & Madberger, june 2006; Chowdhury et al., 2010; Al-Boloshi, 2010). Nonetheless, the rapid development on internet has turned the usage of internet advertising frequently push upward (Yunos, Gao, & Shim, 2003). Hence, this has intensified the interest of researchers to do relevant studies about advertising.While many researchers have been dedicated to examining advertising, the essential of attitude to advertising has also been recognized. Attitude towards marketing is known as a essential concept..