Andre is paid $4 per hour for the first 30 hours he works every week. he makes $5 per hour for each hour he works over 30 hours per week. in other words, total wages = fixed wages for 30 hours + additional wages at $5 per hour. write a function that gives andrew's total wages when he works more than 30 hours.

Since we are not concerned about when hours are less than 31.

For the first 30 hours he earns 4*30=$120.  So as a linear equation 120 is the y-intercept and since he earns $5 per hour after 30 hours the slope, or rate of change is 5 thus:

y=5(x-30)+120 where y is wages in dollars and x is total hours worked

y=5x-150+120

y=5x-30