Here we're given the slope (9/4) of a line and one point (4, 4) on the line. The easiest form of the equation of a straight line to use here is the point-slope form:
Tax=tax rate times cost of product tax=17.50 cost of product=250 17.50=rate times 250 divide both sides by 250 17.50/250=rate 0.07=rate percent means parts out of 100 0.07/1 times 100/100=7/100=7% 7%=rate
