answer:1) To find the slope, you use the following formula: slope formula: m = [y1 – y2] / [x1 – x2] 2) Now you have the slope and two points. You can find the equation (by solving first for ”b”) if you have a point and the slope. So, you need to pick one of the points (it doesn’t matter which one), and use it to solve for b. Using the point (1.4, 0.9), plug in the m value you found above. Just as an example, say you found m=3: y = mx + b 0.9 = 3(1.4) + b solve for b 3) Take the m and b values you found above and plug them into the slope-intercept form of y = mx + b. As an example, I’ll use m=3 and b=5: y = 3x + 5 . Reference: Straight-Line Equations: Slope-Intercept Form and Slope of a Straight Line