Answer:
the slope is 
Step-by-step explanation:
Notice that you are given two points to use for the slope calculation:

So we use the formula for the slope of a line given two points:

Add 10 to both sides. X is 2. A.
The answer is infinitely many solutions.
If you graph them both are a straight line which means they are infinite
Add 8 to 46. Then divide 54/8 to get 6.75 and t=6.75