The number line model may be used to simplify which of the following? –1 + 2 = 1

–1 + 2 = –3

–1 + 2 = –1

–1 + 2 = 3

Triangle abc and triangle deg are similar right triangles. which proportion can be used to show that the slope of ac is equal to the slope of dg? a) 4 − (−7) / 0 − 4 = −1 − 10 / 4 − 8b) −4 − (−7) / 0 − 4= 4 − 8 / −1 − (−10)c) 0 − 4 / −4 − (−7) = −1 − (−10) / −4 − 8d) 0 − 4 / −4 − (−7) = −4 − 8 / −1 − (−10)