Error Analysis

For this problem the x values are going up by 5 which would make the slope 2, not 10. After plotting the point on a graph the solution you get is not equal to y= 9 + 10x which is why this problem is wrong. The right equation would be y= 2x + 9.

mber 20 the line should be dotted because the y is only greater than the equation, not greater than or equal to. For number 21 it's wrong because the y is less than or equal to the equation which means it should be shaded below the line, not above.

For number 22 the y is only less than x +3 which would mean that it wouldn't be a solid line, but a dotted line and for number 23 the line is correct but the shading would need to be on the opposite side of the line since it's greater than, not less than.

After pluggin in the solution (1, -2) to both of these equations it shows that this solution works for the first equation but not the second one and in order for this point to be the correct solution in would have to work both of the problems.