Answer:
y = 4x + -3 
Step-by-step explanation:
1. Write the formula for slope y = mx + b 
2. Find a point anywhere on the graph and use rise over run. Find slope by counting how many times you rise up. 
3. You rose 4. The variable m is for the slope of a line so fill in the number 4.   y = 4x + b 
4. The variable b represents the y intercept and the y intercept is where the line crosses over the y axis. So that would be -3 
5. Fill in the variable b with -3 
6. Finally you would have y = 4x + -3 
Hope this is right and hope this helps in the future!