Here you go, hope it helps!
Step-by-step explanation:
Determine whether a number is a solution to an equation.
Substitute the number for the variable in the equation.
Simplify the expressions on both sides of the equation.
Determine whether the resulting equation is true. If it is true, the number is a solution. If it is not true, the number is not a solution.
Hoped that helped:P
Answer:
About 72 degrees
Step-by-step explanation:
D) 12x+9
the slope is 12 and the intercept is 9