Answer:
if she works 4 hours each day, then she makes 100 plus 50 * 5 * 4 = 100 + 250 * 4 = 100 + 1000 = 1100 php each week.
if she works 5 hours each day, then she makes 100 plus 50 * 5 * 5 = 250 * 5 = 100 + 1250 = 1350 php each week.
if she works x hours each day, then she makes 100 plus 50 * 5 * x = 100 + 250 * x each week.
that's your expression for the number of php she makes each week.
the expression is 100 + 50 * 5 * x.
this is simplified to 100 + 250 * x.
wen x = 4, the expression becomes 100 + 250 * 4 = 1100
when x = 5, the expression becomes 100 + 250 * 5 = 1350.
that expression is actually the right side of the equation for the amount of php she makes each week.
if you let r = the amount of php she makes each week, then the equation becomes:
r = 100 + 250 * x
when x = 4, the equation becomes r = 100 + 250 * 4 = 1100.
when x = 5, the equation becomes r = 100 + 250 * 5 = 1350.
you can graph this equation by replacing r with y.
the equation becomes y = 100 + 250 * x
the graph looks like this.
