Write the equation of the line passing through (0,-8),with slope of -1/2, in slope-intercept form

What is the value of x in the this question ?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

What is the value of the product (3-2i)(3+2i)?