Answer:
Step-by-step explanation:
First, start off by solving for the slope using this formula:
[tex]\frac{y_{2} -y_{1} }{x_{2}-x_{1} }[/tex]
Then, plug in the values: [tex]\frac{0-(-3)}{7.5-0}[/tex]
Solve the equation: [tex]\frac{3}{7.5}[/tex]
That's your slope.
Then plug in one of the coordinates given in the problem for x and y and solve this equation:
y=[tex]\frac{3}{7.5}[/tex]x+b
Hope that helped!!! :)