Slope and y intercept story problem?

Rental Demand - A real estate office handles an apartment complex with 50 units. When the rent per unit is $580 per month, all 50 units are occupied. However, when the rent is $625 per month, the average number of occupied units drops to 47. Assume that the relationship between the monthly rent p and the demand x is linear.

A.) Write the equation of the line giving the demand x in terms of rent p.

B.) Use a graphing utility to graph the demand equation and use the trace feature to estimate the number of units occupied when the rent is $655. verify your answer algebraically.

C.) Use the demand equation to predict the number of units occupied when the rent is lowered to $595. Verify your answer graphically.

why don't you draw it out, put the price on x axis and number of apt. unit on y axis.
then the slope is: ( i think) (y2-y1)/(x2-x1) = (650-580)/(50-47) = 23.33
for the other 2 questions, draw it out and just extent the line

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