Lanika needs a sheet of card that is at least 3/10 mm thick.
at home she finds some card but she doesn't know how thick it is.
lanika finds out that there are 45 sheets of card with a total thickness of 14mm
is the card thick enough for lanika to use
show how you decide

Each sheet is 14/45 mm, that works out to be 0.31mm, so yes it's thick enough.

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.