y - y1 = m(x - x1) slope(m) = 2 (1,9)...x1 = 1 and y1 = 9 now we sub y - 9 = 2(x - 1) <=== point slope form
y - 9 = 2(x - 1) y - 9 = 2x - 2 y = 2x - 2 + 9 y = 2x + 7 <== slope intercept form =========================== 3. (-4,-5) : slope = 3/4
y - y1 = m(x - x1) slope(m) = 3/4 (-4,-5)....x1 = -4 and y1 = -5 now we sub...but pay very close attention to ur signs.... y - (-5) = 3/4(x - (-4)...not done yet y + 5 = 3/4(x + 4) <=== point slope form
y + 5 = 3/4(x + 4) y + 5 = 3/4x + 3 y = 3/4x + 3 - 5 y = 3/4x - 2 <== slope intercept form
