USE CALCULATOR!!! EPLAINT OOOO
Keep in mind that, when the logarithm base is not explicitly written, base 10 is assumed, therefore,
Vicky’s average speed is 0.55m/h
You need to go from slope-intercept (

) to standard form (

).
slope-intercept form of your provided values:
now, solve for x and y
Your answer is 
.