y = kx + b (0;−8) −8 = 0k + b b = −8   (2;12) 12 = 2k − 8 2k = 12 + 8 2k = 20 k = 10   y = 10x − 8 − уравнение прямой. при x = −2: y = 10 * (−2) − 8 = −20 − 8 = −28; при x = 4: y = 10 * 4 − 8 = 40 − 8 = 32; при x = 6: y = 10 * 6 − 8 = 60 − 8 = 52.

y = kx + b (0;5) 5 = 0k + b b = 5   (10;6) 6 = 10k + 5 10k = 6 − 5 10k = 1 k = 0,1   y = 0,1x + 5 − уравнение прямой. при x = −10: y = 0,1 * (−10) + 5 = −1 + 5 = 4; при x = 30: y = 0,1 * 30 + 5 = 3 + 5 = 8. при y = −15: −15 = 0,1x + 5 −20 = 0,1x x = −200 при y = 15: 15 = 0,1x + 5 10 = 0,1x x = 100