If the approximate height of this right prism with triangular bases is 3.5 centimeters, what is its approximate surface area?

The answer is y= x+1  the slope intercept form of a line is y = mx +b. since the line passes through (-1,2), there are three possibilities: the line will have a slope ( the 'm' in front of the "x" variable), it will be vertical (x=-1), or it will be horizontal (y=2) plug x=-1 into all four equations to see which equation is not satisfied. the only answer choice that does not give us y = 2 is the equation y = x+1