Answer:
a. the cost of the t-shirt
b. x+12=34
c. x=22
d. t-shirt cost 22$
I am so sorry no one responded right away!
1. To find the slope do the rise/sun. So you need to create a right triangle by connecting the points. If the line goes from left to right than it is a negative slope. But if it goes from right to left than it is a positive slope. Count how many down from the top point to the bottom and then count how many to connect the 2. But the points you give make a straight line. Meaning the slope is 0. Hope someone answer the rest of your questions because this is the only one I know!