(25 POINTS!!)What is the equation of the line that passes through the points (15,9) and (-2,9)?I need this answered with in the next 20 minutes so someone please help :,DThe answer is gonna be a equation like y=

Let's use the point-slope formula... y-y1=m(x-x1) m is the slope. y--9=7(x--2) Subtracting a negative number is the same as adding a positive number... y+9=7(x+2) y+9=7x+14 Let's subtract 9 from both sides... -9+y+9=7x+14-9 y=7x+5 The formula is now in the format of... y=mx+b This is known as slope-intercept. m is the slope. b is the y-intercept, the value of y when x=0. Standard formula is... Ax+By=C Neither A nor B equal zero. A is greater than zero. y=7x+5 Let's move 7x to the left side of the equation.  It becomes negative. -7x+y=5 Let's multiply both sides by -1 to render A greater than zero. -1(-7x+y)=(5)(-1) 7x-y=-5 This is the equation in standard form.