Jordan is calculating the slope of the trend line in the scatterplot below. On a coordinate plane, a trend line has a positive slope. How can Jordan use the plot to check the reasonableness of his answer? His slope should be positive because the coordinates of all the plotted points are positive. His slope should be positive because the trend line is slanted up to the right. His slope should be negative because there are plotted points not on the line. His slope should be negative because the x-coordinate of each plotted point is less than the y-coordinate.

His slope should be positive because the trend line is slanted up to the right.  

Step-by-step explanation:

Assume the graph is like the one below.

The line is slanted up and to the right, so the slope is positive.

A is wrong. The points could all be positive and have a negative slope.

C is wrong. Most of the points are not on the line but the slope is still positive.

D is wrong. The slope does not depend on the values of x and y. It depends on the values of Δx and Δy.

answer: 12

step-by-step explanation:

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5